Question

prove that the given value is = 13/33​

Answer 1

(3^30+3^29+3^28) /3^31+3^30-3^29

3^28(3^2+3+1) /3^28(3^3+3^2-3)

3^28 gets cancelled

(9+3+1) /27+9-3)

13/33

hence proved

hope it helps