已知x^a=3,x^b=5,则x^(3a+2b)的值为
人气：369 ℃ 时间：2020-04-14 02:05:20
解答
x^(3a+2b） 先去掉括号
x^3a+x^2b=x^a×x^a×x^a+x^b×x^b×x^b=3×3×3+5×5×5=27+125=152
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