Fully simplified and write your answer in exponential form with positive exponents only

2^-9 . 2 . 2^-7

To simplify 2^-9 * 2 * 2^-7, we can add the exponents of 2.

2^-9 * 2 * 2^-7 = 2^(-9+1-7)

Simplifying further,

2^(-9+1-7) = 2^(-15)

Therefore, the fully simplified exponential form with positive exponents only is:

2^-9 * 2 * 2^-7 = 2^(-15)