Diketahui f(x)= 2x-1/x+3 adalah x=/ -3 nilai f(a+1) =

Mapel : Matematika

Bab : Relasi dan Fungsi
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f(x) = (2x - 1)/(x + 3) → x ≠ -3

Ditanya → nilai f(a + 1)

Penyelesaian :
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= (2x - 1)/(x + 3)
= [2(a + 1) - 1] / [(a + 1) + 3]
= [2a + 2 - 1] / [a + 4]
= (2a + 1)/(a + 4)

Jadi :
f(a + 1) = (2a + 1)/(a + 4)