rút gọn biểu thức và xác định bậc V=(x.y2.z)n.xn+1.2(y.z2)n-1

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Đáp án+Giải thích các bước giải:

V=(x.y2.z)n.xn+1.2(y.z2)n1=xn.(y2)n.zn.xn+1.2yn1.(z2)n1=xn.y2n.zn.xn+1.2yn1.z2(n1)=2.(xn.xn+1).(y2n.yn1).(zn.z2(n1))=2.xn+n+1.y2n+n1.zn+2n2=2x2n+1y3n1z3n2

Bậc: 2n+1+3n1+3n2=8n2.

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