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f(x)=2x²+ 9
g(x)= akar 3x-1
h(x)=4x+3
Dijwb:
((f°g)°h)(x)
= 4(akar 3(2x²+9) -1) +3
=(4(akar 3(2x²+9) -1) +3)²
=16( 3(2x²+9) -1) +9
=16( 6x²+27-1 ) +9
=16( 6x²+26 ) +9
= 96x² +416 +9
=96x² +425 (jika msih bisa disederhanakan, sederhanalah)