Question

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Answer 1

На фото......................

Answer 2

$185)log_{a} (a^{2}b^{5} )=log_{a}a^{2}+log_{a}b^{5}=2log_{a}a+5log_{a} b=2*1+5*frac{1}{log_{b}a }=2+5*17=87\\186)log_{a} frac{a^{5} }{b^{9} }=log_{a}a^{5}-log_{a}b^{9}=5log_{a}a-9log_{a}b=5*1- 9*4=5-36=-31\\187)log_{a}(a^{7}b^{11})=log_{a}a^{7}+log_{a}b^{11}=7log_{a}a+11log_{a}b=7*1+11*(-5)=7-55=-48$