Math, asked by tanzeelasad05, 5 months ago

7^n+3-7^n-2+7^n/7^n-7^n-2+7^n+3

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Answered by singhsumit9583757

3

Step-by-step explanation:

: z=7^(n+2)-3×7^(n+1)/20× 7^(n)-2×7^(n). let 7^n=x. then z=( x*7^2-3*7*x) / (20x-2x). =(49x-21x)/18x. =28x/ ...

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