若a与b互为相反数,c与d互为负倒数,m的绝对值是2,|a+b|-(m²-cd)+2(m²+cd)-m五方a-m五方b的是
问题描述:
若a与b互为相反数,c与d互为负倒数,m的绝对值是2,|a+b|-(m²-cd)+2(m²+cd)-m五方a-m五方b的是
答
a与b互为相反数,则a+b=0
c与d互为负倒数,则cd=-1
|a+b|-(m²-cd)+2(m²+cd)-m五方a-m五方b
=0-[4-(-1)]+2*[4+(-1)]-m^5(a+b)
=-5+6-0
=1