3(x-y)²×[-4/15(y-x)³][-3/2(x-y)∧4]
问题描述：
3(x-y)²×[-4/15(y-x)³][-3/2(x-y)∧4]
答
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你的答案是这道题的答案才对：3(x-y)^2[-4/15(y-x)^3][-3/2(x-y^4)] 你对比一下，这两题不一样吧。。你写的这2个有区别吗？分母该加括号的加上括号，否则不知道哪个是分母啊？我说的是后面3(x-y)^2[-4/15(y-x)^3]→ [-3/2(x-y^4)] ← 我的题：3(x-y)²×[-4/15(y-x)³] →[-3/2(x-y)∧4]←我的计算是正确的除了系数外，三个的底数都是(x-y)哦所以底数不变，指数相加=3(x-y)²×[4/15(x-y)³][-3/2(x-y)∧4]=3*4/15*(-3/2)*(x-y)^(2+3+4)