Find all solutions to the equation 7^2a = 45(7^a) + 4 (7^2)?

1 Answer
Jun 7, 2017

See below.

Explanation:

7^2(a-4)=45 xx 7^a or

(a-4)/45=7^(a-2) now calling b = a-2

(b-2)/45=7^b but 7^b gt b, forall b in RR

so the equation does not have real solutions.