Question

If f(x)= 3x + 5/2 what is f(a+2)

Answer 1

f(a + 2)= 3a +
`(17)/(2)`

substitute x = a + 2 into f(x)

f(a + 2) = 3(a + 2) +
`(5)/(2)`

= 3a + 6 +
`(5)/(2)` = 3a +
`(17)/(2)`