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= f(2+x)
= 3+2(2+x)
= 3+4+2x
= 7+2x
fogoh(x) = fog(h(x))
= fog(2x)
= 7+2(2x)
= 7 + 4x
misal fogoh(x) = y
y = 7+4x
y-7 = 4x
x = y-7/4
invers fogoh(x) = x-7 /4
semoga dapat di pahami