(a+b)(a-b)=a2-b2 (a+b)2=a2+2ab+b2 (a-b)2=a2-2ab+b2 (a+b)3=a3+3a2b+3ab2+b3 (a-b)3=a3-3a2b+3ab2-b3 一元二次方程ax2+bx+c=0的解x?,?=(-bb2-4ac)/2a *Simple Interest:利息Interest=本金Principal?时间Time?利率Rate。 *Compound Interest:A=(1+R)n;A为本利和,P为本金,R为利率,n为期数。 *Discount=Cost?Rate of Discount *Distance=Speed?Time *Pythagorean Theorem(勾股定理):直角三角形(right triangle)两直角边(legs)的平方和等于斜边 (hypotenuse)的平方。 *多变形的内角和:(n-2)180,总对角线数为n(n-3)/2条,从每一个顶点引出的对角线数为(n-3)条;式中:n为多边形的边数 *平面直角坐标系中,A(x1,y1)和B(x2,y2)是任意两点,C(x,y)是线段AB的中点,则x=(x1+x2)/2,,y=(y1+y2)/2,线段AB两端点间的距离= *平面图形的周长和面积: Perimeter Area Triangle 三边之和 (底高)/2 Square 边长4 边长的平方 Rectangle (长+宽)2 长宽 Parallelogram (长+宽)2 底高 Trapezoid 四边之和 (上底+下底)高/2 Rhombus 边长4 两条对角线之积的1/2 Circle 2d r2 *立体图形的表面积和体积: Volume Surface Area Rectangular Prism 长宽高 2(长宽+长高+宽高) Cube 棱长的立方 6棱长棱长 Right Circular Cylinder r2h 2r h(侧)+2r2(底) Sphere 4r3/3 4r2 Right Circular Cone r2h/3 lr/2 (l为母线) 以上就是GMAT数学常用公式汇总的详细内容,考生可针对文中介绍的方法进行有针对性的备考。最后,预祝大家在GMAT考试中取得好成绩!
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