minta tolong yaa kak
Jawaban:
E.0
Penjelasan dengan langkah-langkah:
Diketahui: f(x)= x + 3 dan (g o f) (x) = 2x² + 4x -3
(g o f)(x) = 2x² + 4x - 3
g( f(x)) = 2x²+ 4x - 3
g ( x + 3) = 2x² + 4x - 3
Misalkan, x + 3 = p, maka
x = p - 3
g(p) = 2( p - 3 )² + 4 ( p - 3 ) - 3
g(p) = 2p² - 12p + 18 + 4p - 12- 3
g(p) = 2p² - 8p + 3
g(x) = 2x² - 8x + 3.
Maka :
f o g(1) = f (g(1)) = f ( 2.1² - 8.1 + 3)
= f (-3) = -3+3=0.
MAAF JIKA SALAH
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