<html lang="en"><head><style>              .article-container {                width: 100%;                font-family: Microsoft JhengHei,Helvetica Neue,Helvetica,Arial,sans-serif;              }              ul, ol {                margin: 12px auto;                max-width: 740px;                color: #535150;                line-height: 1.8;                padding-left: 0px;              }              .graf--img {                display: table;                justify-content: center;                align-items: center;                text-align: center;                color: gray;                font-size: 14px;                letter-spacing: 0px;                margin: 10px auto 50px;                width: 100%;                position: relative;                clear: both;              }              .graf--img.center img {                width: 100%;                max-width: 740px;                margin: 10px auto 0px;                display: block;                margin: 0 auto; 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               max-width: 740px;                text-align: left;              }              .graf--quotesSpecial {                display: table;                color: #7A7574;                position: relative;                padding: 31.5px 40px;                text-align: center;                letter-spacing: 0px;                position: relative;                margin: 29px auto;                font-family: "Microsoft JhengHei fixed", "Helvetica Neue", "Microsoft JhengHei", Helvetica, "Segoe UI", Tahoma, Arial, sans-serif;                font-size: 16px;                -webkit-box-ordinal-group: 1;                -webkit-box-flex: 0;              }              .embed-wrapper {                max-width: 740px;                border: 1px solid #DDD9D8;                display: block;                padding: 12px;                border-radius: 8px;                margin: 12px 0px;                text-decoration: none !important;              }              .embed-title {                font-size: 16px;                font-weight: 700;                color: #535150;                margin-bottom: 8px;                text-align: left;                line-height: 1.5;                text-decoration: none !important;              }              .embed-description {                width: 100%;                font-size: 14px;                color: #7A7574;                line-height: 1.5;                max-height: 150px;                text-align: left;                overflow: hidden;                padding: 12px 0px;              }              .embed-url > a {                width: 100%;                font-size: 14px;                color: #141413 !important;                text-decoration: none !important;                line-height: 1.5;                text-align: left;              }                            .embed-thumbnail-wrapper {                padding-left: 12px;              }              .embed-thumbnail {                width:100px;                border-radius: 8px;              }              pre {                background: #F6F6F6;                border-radius: 8px;                padding: 16px;                font-size: 16px;                color: #535150;                line-height: 180%;                text-align: left;              }              .lexical__textBold {                font-weight: bold;              }              .lexical__textItalic {                font-style: italic;              }              .lexical__textUnderline {                text-decoration: underline;              }              .lexical__textStrikethrough {                text-decoration: line-through;              }              .lexical__textUnderlineStrikethrough {                text-decoration: underline line-through;              }              .lexical__textSubscript {                font-size: 0.8em;                vertical-align: sub;              }              .lexical__textSuperscript {                font-size: 0.8em;                vertical-align: super;              }              .lexical__textCode {                background-color: rgb(240, 242, 245);                padding: 1px 0.25rem;                font-family: Menlo, Consolas, Monaco, monospace;                font-size: 94%;              }            </style></head><body><div class="article-container"><div class="graf--img center"><div class="lexical__imageWrapper"><img src="https://images.vocus.cc/5a4b1341-7246-4b1b-b9ad-006fac6e3068.png" data-src="https://resize-image.vocus.cc/resize?compression=6&norotation=true&url=https%3A%2F%2Fimages.vocus.cc%2F5a4b1341-7246-4b1b-b9ad-006fac6e3068.png&width=740&sign=avZ5vBdeW0IW-H1C0aJhi2Hlhczysp7pqzwrjDsuJfI" class="lazy" data-loaded="false" data-original-src="https://images.vocus.cc/5a4b1341-7246-4b1b-b9ad-006fac6e3068.png" data-lowquality="false" data-width="933" data-height="888" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><div class="graf--img center"><div class="lexical__imageWrapper"><img src="https://images.vocus.cc/9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png" data-src="https://resize-image.vocus.cc/resize?compression=6&norotation=true&url=https%3A%2F%2Fimages.vocus.cc%2F9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png&width=740&sign=9LH_YOPbyVqYrOhv3Brc0l3VUd0b1s_cw0Z2IWtPuyg" class="lazy" data-loaded="false" data-original-src="https://images.vocus.cc/9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png" data-lowquality="false" data-width="947" data-height="589" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><hr><h2 class="graf--h2" dir="ltr"><span style="white-space: pre-wrap;">解答：</span></h2><div class="graf--img center"><div class="lexical__imageWrapper"><img src="https://images.vocus.cc/454bce7d-1823-4865-b48b-43ef3bb5830a.png" data-src="https://resize-image.vocus.cc/resize?compression=6&norotation=true&url=https%3A%2F%2Fimages.vocus.cc%2F454bce7d-1823-4865-b48b-43ef3bb5830a.png&width=740&sign=IptBwD9-aGZM_WCu6qlECMLo5atipCFf9JgPllUBfWE" class="lazy" data-loaded="false" data-original-src="https://images.vocus.cc/454bce7d-1823-4865-b48b-43ef3bb5830a.png" data-lowquality="false" data-width="1120" data-height="1672" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><p class="graf--p"><br></p></div></body></html>

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學習

集合概念（三）

集合概念（一）

今年，vocus 的 iOS 工程師 YC 帶著技術交流（以及讓更多人認識 vocus）的使命，參與了今年的 try! Swift Tokyo 研討會，這系列的文章，我們將會分享研討會當中的精彩學習，還有那些網路上看不到的研討會體驗細節（讚嘆主辦方的用心）！

方格子 vocus 官方沙龍

vocus tech｜iOS 工程師前進東京！參加 try! Swift Tokyo 研討會的學習與啟發（上）

中學數學基礎練習—分組分解法

WilliamP的沙龍

分組分解法（一）

配方法練習（二）

配方法練習（一）

高中數學主題練習—對數方程式

對數方程式（一）

高中數學主題練習—指數律基本練習

指數律基本練習（二）

指數律基本練習（一）

分點計算（一）

根式化簡（二）

根式化簡（一）

高中數學主題練習—相關係數計算

親子與教育

投資理財

中學數學基礎練習題庫

歡迎來到 WilliamP 的沙龍天地，在這裡將與各位讀者探討各種主題，包刮高中數學題庫、PHP開發經驗、LINE聊天機器人開發經驗、書摘筆記等，歡迎交流！

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高一段考考古題解庫

高二段考考古題解庫

高三段考考古題解庫

高中數學段考考古題題解—全學校

來聊：PHP 美麗哀愁

集合概念（二）

<div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F5a4b1341-7246-4b1b-b9ad-006fac6e3068.png&amp;width=740&amp;sign=avZ5vBdeW0IW-H1C0aJhi2Hlhczysp7pqzwrjDsuJfI" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F5a4b1341-7246-4b1b-b9ad-006fac6e3068.png&amp;width=740&amp;sign=avZ5vBdeW0IW-H1C0aJhi2Hlhczysp7pqzwrjDsuJfI" data-loaded="true" data-original-src="https://images.vocus.cc/5a4b1341-7246-4b1b-b9ad-006fac6e3068.png" data-lowquality="false" data-width="933" data-height="888" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png&amp;width=740&amp;sign=9LH_YOPbyVqYrOhv3Brc0l3VUd0b1s_cw0Z2IWtPuyg" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png&amp;width=740&amp;sign=9LH_YOPbyVqYrOhv3Brc0l3VUd0b1s_cw0Z2IWtPuyg" data-loaded="true" data-original-src="https://images.vocus.cc/9c6ed8a4-69b8-44fd-be32-df49eff2c2cd.png" data-lowquality="false" data-width="947" data-height="589" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><hr><h2 class="lexical__h2" dir="ltr"><span style="white-space: pre-wrap;">解答：</span></h2><div class="lexical__image center"><div class="lexical__imageWrapper"><img src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F454bce7d-1823-4865-b48b-43ef3bb5830a.png&amp;width=740&amp;sign=IptBwD9-aGZM_WCu6qlECMLo5atipCFf9JgPllUBfWE" data-src="https://resize-image.vocus.cc/resize?compression=6&amp;norotation=true&amp;url=https%3A%2F%2Fimages.vocus.cc%2F454bce7d-1823-4865-b48b-43ef3bb5830a.png&amp;width=740&amp;sign=IptBwD9-aGZM_WCu6qlECMLo5atipCFf9JgPllUBfWE" data-loaded="true" data-original-src="https://images.vocus.cc/454bce7d-1823-4865-b48b-43ef3bb5830a.png" data-lowquality="false" data-width="1120" data-height="1672" data-retry="0" onerror="Number(this.dataset.retry) > 4 ? this.src='/static/default-error-img.svg': (() => {this.src=this.dataset.originalSrc; this.dataset.retry = Number(this.dataset.retry)+1;})()" alt="raw-image"></div><div></div></div><p class="lexical__paragraph"><br></p>