Jawabanmu

2014-02-17T17:22:23+07:00
2) diketahui f(x) = 2x²+5x dan g(x)=1/x tentukan (f o g) (2) ?
fog(x)
= f(g(x))
= f(1/x)
= 2(1/x)^2 + 5(1/x)
= 2(1/x^2) + 5/x
= 2/x^2 + 5x
= (2+5x) / x^2

nilai fog(x) = (2+5x) / x^2
fog(2) = ?
x = 2
fog(x) = (2+5x) / x^2
fog(2) = (2+10) / 4
fog(2) = 12 / 4
fog(2) = 3
1) Diketahui f(x) = x-1/x+1 , x ≠ -1 dan g(x) = x²+1/1-x², x ≠ ±1 tentukan fᴏg (x) ?
f(x) = (x-1) / (x+1)
g(x) = (x^2 + 1) / (1 - x^2)
fog(x) = ?
f(g(x))
f{(x^2 + 1) / (1 - x^2)}
[{(x^2 + 1) - 1} / {(x^2 + 1) + 1] / [{(1 - (x^2 + 1)

pusing ~!~ lanjutkan sendiri yah. insya Allah benar :)
sama aja
maksudnya?
gak, yaudh terima kasih :)
yo