3(x-y)²×[-4/15(y-x)³][-3/2(x-y)∧4]
=3(x-y)²×[4/15(x-y)³][-3/2(x-y)∧4]
=3*4/15*(-3/2)*(x-y)^(2+3+4)
=-6/5(x-y)^9你的答案是這道題的答案才對(duì)：3(x-y)^2[-4/15(y-x)^3][-3/2(x-y^4)] 你對(duì)比一下，這兩題不一樣吧。。你寫的這2個(gè)有區(qū)別嗎？分母該加括號(hào)的加上括號(hào)，否則不知道哪個(gè)是分母?。课艺f的是后面3(x-y)^2[-4/15(y-x)^3]→ [-3/2(x-y^4)] ← 我的題：3(x-y)²×[-4/15(y-x)³] →[-3/2(x-y)∧4]←我的計(jì)算是正確的除了系數(shù)外，三個(gè)的底數(shù)都是(x-y)哦所以底數(shù)不變，指數(shù)相加=3(x-y)²×[4/15(x-y)³][-3/2(x-y)∧4]=3*4/15*(-3/2)*(x-y)^(2+3+4)