Express the function f(x) = -5 * 3^2x+1 in the form a*d^x

Question

Express the function f(x) = -5 * 3^2x+1 in the form a*d^x
 
help please

oobleck · Accepted Answer

can't do it. f(x) is a polynomial, not an exponential function.
Exponentials have a horizontal asymptote. Polynomials do not.

You can pick any small portion of the curve and approximate it arbitrarily closely with an exponential, but that's the best you can do.