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,](/uploads/image/z/1104178-58-8.jpg?t=%E8%8B%A5ab%E4%BA%92%E4%B8%BA%E5%80%92%E6%95%B0%2Cxy%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%7Cm%7C%EF%BC%9D3+%E6%B1%82%EF%BC%9B%EF%B9%991%EF%B9%9Ax%26%23179%3B%E5%88%86%E4%B9%8Bx%EF%BC%8By%EF%BC%8Dab%EF%BC%8Bm%26%23178%3B%EF%BC%8D8%E7%9A%84%E5%80%BC%2C%EF%B9%991%EF%B9%9Ax%26%23179%3B%E5%88%86%E4%B9%8Bx%EF%BC%8By%2C%2C%2C.%EF%BC%8Dab%EF%BC%8Bm%26%23178%3B%EF%BC%8D8%E7%9A%84%E5%80%BC%EF%BC%8C)
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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:)
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