Question: modify an expression, fraction

Hello People in mapleprimes,

a^k*k/(a*a__0^k)

would not be simplifyed to k*a^(k-1)/a__0^k

with

symplify(a^k*k/(a*a__0^k)) assuming(k>1);

or other commands including expand.

Is there any way other than simplify(numer(..)/a)/simplify(denom(..)/a); ?

Thanks in advance.

 

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