Which of the following are exponential functions? Select all correct answers.

Select all that apply:

a) f (x) = 4 (1/4) ^x

b) g (x) = 14 (4) ^x

c) h (x) = 10x^5

d) j (x) = -9x^4

e) k (x) = 6 (5.49) ^x

a) f (x) = 4 (1/4) ^x

b) g (x) = 14 (4) ^x

e) k (x) = 6 (5.49) ^x

Step-by-step explanation:

If x is in the exponent (that is, something elevated to x), it is an exponential function.

Otherwise, if x is in the base (that is, x elevated to something), it is a polynomial function.

a) f (x) = 4 (1/4) ^x

x in the exponent, so exponential

b) g (x) = 14 (4) ^x

x in the exponent, so exponential

c) h (x) = 10x^5

x in the base, so polynomial

d) j (x) = -9x^4

x in the base, so polynomial

e) k (x) = 6 (5.49) ^x

x in the exponent, so exponential