1.

Please give me the answer to this question.

Answer»

{5^(n+2)-6×5^(n+1)}/{13×5^n-2×5^(n+1)}={5^n×5^2-6×5^n×5^1}/{13×5^n-2×5^n×5^1}={5^n×25-6×5×5^n}/{13×5^n-2×5×5^n}=(25×5^n-30×5^n)/(13×5^n-10×5^n)=5^n(25-30)/5^n(13-10)= -5/3= -1 2/3



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