logc(b) = 1/logb(c)
logb(a)/logb(c) = logc(a)
so, logc(a)^2 = 25
logc(a) = ±5
so, a = c^5 or 1/c^5
See what you can do with that
7. If logb(a)⋅logc(a)⋅logc (b) = 25 and a2/c2 = ck, what is the sum of all possible values of k?
1 answer
1 answer