Question

Sa se calculeze (fof)(-1)
sa se calculeze (fof)(5 supra 2)
f(x)= x+4
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Answer 1

(fof)(-1) = f(f(-1))

f(-1) = -1+4 = 3

f(3) = 3+4 = 7

(fof)(5/2) = f(f(5/2))

f(5/2) = 5/2 + 4 = 5/2 + 8/2 = 13/2

f(13/2) = 13/2 + 4 = 13/2 + 8/2 = 21/2