GRE数学常用公式集锦
<p> 对于考生们来说比较宽松，但是为了保证争取率，应该加快速度，做题后检查。下面就为大家<span word="GRE">GRE</span>数学常用公式总结出来，将<span word="GRE">GRE</span>数学公式熟记可加快做题速度。下面一起来看看吧。</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>3时间<span word="Time">Time</span>3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>3<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>3<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，线段<span word="AB">AB</span>两端点间的距离=</p><p> 平面图形的周长和面积：</p><p> <span word="PerimeterArea">PerimeterArea</span></p><p> <span word="Triangle">Triangle</span>三边之和/2</p><p> <span word="Square">Square</span>边长4边长的平方</p><p> <span word="Rectangle">Rectangle</span>2长宽</p><p> <span word="Parallelogram">Parallelogram</span>2底高</p><p> <span word="Trapezoid">Trapezoid</span>四边之和高/2</p>
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