GRE数学常用公式简介
<p> 那对于想要拿<span word="GRE">GRE</span>数学高分的同学，数学公式是解题的基础。下面是在线为广大考生整理的<span word="GRE">GRE</span>数学常用公式介绍，希望帮助大家解决<span word="GRE">GRE</span>考试难题，取得好的成绩。</p><p> =<span word="a">a</span>2-<span word="b">b</span>2 2=<span word="a">a</span>2+2<span word="ab">ab</span>+<span word="b">b</span>2 2=<span word="a">a</span>2-2<span word="ab">ab</span>+<span word="b">b</span>2</p><p> 3=<span word="a">a</span>3+3<span word="a">a</span>2<span word="b">b</span>+3<span word="ab">ab</span>2+<span word="b">b</span>3 3=<span word="a">a</span>3-3<span word="a">a</span>2<span word="b">b</span>+3<span word="ab">ab</span>2-<span word="b">b</span>3</p><p> 一元二次方程<span word="ax">ax</span>2+<span word="bx">bx</span>+<span word="c">c</span>=0的解<span word="x">x</span>?,?=/2<span word="a">a</span></p><p> <span word="Simple">Simple</span> <span word="Interest">Interest</span>:利息<span word="Interest">Interest</span>=本金<span word="Principal">Principal</span>?时间<span word="Time">Time</span>?利率<span word="Rate">Rate</span>。</p><p> <span word="Compound">Compound</span> <span word="Interest">Interest</span>:<span word="A">A</span>=<span word="n">n</span>;<span word="A">A</span>为本利和，<span word="P">P</span>为本金,<span word="R">R</span>为利率,<span word="n">n</span>为期数。</p><p> <span word="Discount">Discount</span>=<span word="Cost">Cost</span>?<span word="Rate">Rate</span> <span word="of">of</span> <span word="Discount">Discount</span> <span word="Distance">Distance</span>=<span word="Speed">Speed</span>?<span word="Time">Time</span></p><p> <span word="Pythagorean">Pythagorean</span> <span word="Theorem">Theorem</span>:直角三角形两直角边的平方和等于斜边 的平方。</p><p> 多变形的内角和：180，总对角线数为<span word="n">n</span>/2条，从每一个顶点引出的对角线数为条;式中：<span word="n">n</span>为多边形的边数</p><p> 平面直角坐标系中，<span word="A">A</span>和<span word="B">B</span>是任意两点，<span word="C">C</span>是线段<span word="AB">AB</span>的中点，则<span word="x">x</span>=/2,,<span word="y">y</span>=/2</p><p> </p>
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