Index.of Natural/ .jpg -htm -html -php -stats Solve This Mathematical Riddle?

Solve this mathematical riddle? - index.of natural/ .jpg -htm -html -php -stats

Doubling the rate of an exponential expression with a positive basis, then the expression is increased by 700%. If you have values, the depth of the base, P) (a natural number, then it is possible that the value of P?