精选GREQuantitative考试常用公式小结
来源:才华咖 本文已影响1.96W人
来源:才华咖 本文已影响1.96W人
2=a2+2ab+b2 2=a2-2ab+b2
3=a3+3a2b+3ab2+b3 3=a3-3a2b+3ab2-b3
一元二次方程ax2+bx+c=0的解x , =/2a
Simple Interest:利息Interest=本金Principal3时间Time3利率Rate。
Compound Interest:A=n;A为本利和,P为本金,R为利率,n为期数。
Discount=Cost3Rate of Discount Distance=Speed3Time
Pythagorean Theorem:直角三角形两直角边的`平方和等于斜边 的平方。
多变形的内角和:180,总对角线数为n/2条,从每一个顶点引出的对角线数为条;式中:n为多边形的边数
平面直角坐标系中,A和B是任意两点,C是线段AB的中点,则x=/2,,y=/2,线段AB两端点间的距离=
平面图形的周长和面积:
PerimeterArea
Triangle三边之和/2
Square边长4边长的平方
Rectangle2长宽
Parallelogram2底高
Trapezoid四边之和高/2
Rhombus边长4两条对角线之积的1/2
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