Evaluate the function.

Question

h(a) = 2^a+1; Find h(a - 4)

Answer 1

just make the substitution:

h(a-4) = 2^(a-4)+1 = 2^a/16 + 1

or, if you were careless with parentheses,

h(a-4) = 2^(a-4+1) = 2^(a-3) = 2^a/8