Question

Plzz help me in this q ​

Answer 1

this is your answer I hope it will help.,

Answer 2

{(7^n+2)-(6×7^n+1)}÷{(21×7^n)-(2×7^n+1)}

{7^n+1(7-6)}÷{(21×(1÷7)-2)}

7^n+1 will be cancelled in both numerator and denominator

now ,

(7-6)÷(21(1÷7)-2)

1÷((21÷7)-2)

1÷(3-2)

1÷1

1 is the exact answer .