已知a=-81/4,b=-31/4,c=-21/2,求b-c的绝对值-a的值

问题描述:

已知a=-81/4,b=-31/4,c=-21/2,求b-c的绝对值-a的值

b-c的绝对值-a的值
=/(-31/4)-(-21/2)/ -(-81/4)
=/(-31/4)-(-42/4)/ -(-81/4)
=(11/4) -(-81/4)
=92/4
=23