x+y=1/2求(x+y)的三次方×(2x+2y)的三次方×(3x+3y)的三次方的值
问题描述:
x+y=1/2求(x+y)的三次方×(2x+2y)的三次方×(3x+3y)的三次方的值
答
原式=(x+y)³×[2(x+y)]³×[3(x+y)]³
=(1/2)³×1³×(3/2)³
=1/8×27/8
=27/64