Question

Ex 52 plssssssssssss

Answer 1

52. 5*7^n:7+4*7^n+3*7^n*7=7^2*180

7^n(5*1:7+4*1+3*1*7)=7^2*180

7^n(5/7+4+21)=7^2*180

7^n(5/7+25)=7^2*180

7^n(5/7+25*7/7)=7^2*180

7^n(5/7+175/7)=7^2*180

7^n*180/7=7^2*180 /:180

7^n*1/7=7^2*1

7^n/7=7^2

7^(n-1)=7^2

7=7=>n-1=2

n-1=2

n=2+1

n=3∈N