计算(a-b)^3n(b-a)^4n÷﹙b-a﹚^5n且﹙a≠b﹚
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计算(a-b)^3n(b-a)^4n÷﹙b-a﹚^5n且﹙a≠b﹚
计算(a-b)^3n(b-a)^4n÷﹙b-a﹚^5n且﹙a≠b﹚
计算(a-b)^3n(b-a)^4n÷﹙b-a﹚^5n且﹙a≠b﹚
(a - b)^ 3 n (b - a)^ 4 n ÷ (b - a)^ 5 n
= -(b - a)^ 3 n(b - a)^ 4 n ÷ (b - a)^ 5 n
= -(b - a)^ (3 n + 4 n - 5 n)
= - (b - a)^ 2 n
解:原式=-(b-a)^3n(b-a)^4n÷(b-a)^5=-(b-a)^2n
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