若ab互为倒数,xy互为相反数,|m|=3 求;﹙1﹚x³分之x+y-ab+m²-8的值,﹙1﹚x³分之x+y,,,.-ab+m²-8的值,

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若ab互为倒数,xy互为相反数,|m|=3求;﹙1﹚x³分之x+y-ab+m²-8的值,﹙1﹚x³分之x+y,,,.-ab+m²-8的值,若ab互为倒数,xy互

若ab互为倒数,xy互为相反数,|m|=3 求;﹙1﹚x³分之x+y-ab+m²-8的值,﹙1﹚x³分之x+y,,,.-ab+m²-8的值,
若ab互为倒数,xy互为相反数,|m|=3 求;﹙1﹚x³分之x+y-ab+m²-8的值,
﹙1﹚x³分之x+y,,,.-ab+m²-8的值,

若ab互为倒数,xy互为相反数,|m|=3 求;﹙1﹚x³分之x+y-ab+m²-8的值,﹙1﹚x³分之x+y,,,.-ab+m²-8的值,
a、b互为倒数,得ab=1
xy互为相反数,得x+y=0
|m|=3,得m²=9
﹙1﹚
x³分之(x+y)-ab+m²-8
=0-1+9-8
=0
﹙2﹚
5ab-m+x-4+y
=5-m-4
=1-m
=-2,(当m=3时)
或=4,(当m=-3时)
﹙3﹚
5x-ab+5y
=5(x+y)-ab
=0-1
=-1

(1):0
(2):4或-2
(3):-1

ab互为倒数,则ab=1
xy互为相反数,则x+y=0
﹙1﹚x³分之x+y-ab+m²-8
=0-1+9-8
=0
﹙2﹚5ab-m+x-4+y
=5-m-4
=1-m
=4或-2
﹙3﹚5x-ab+5y
=5(x+y)-ab
=0-1
=-1

a*b=1
x+y=0
原式=0-1+9-8=0

(1) 0-1+9-8=0
(2) 5-3-4+0=-2 (m<0)或 5+3-4=4 (m>0)
(3) 0-1=-1
亲,别忘了采纳哦:)