Question

Tolong Di Bantu Kak Pliss

Note;

@Jangan Asal Jawab

@Pake Cara
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#Besok Di Kumpulin

Answer 1

Jawaban No 1

f(x) = 2x + 5

g(x) = (x - 1) / (x + 4)

(fog)(x)

= f [ g(x) ]

= 2 ( (x - 1) / (x + 4) ) + 5

= ( (2x - 2) / (x + 4) ) + 5

= ( (2x - 2) / (x + 4) ) + ( (5 (x + 4)) / (x + 4) )

= ( 2x - 2 + 5x + 20 ) / ( x + 4 )

= ( 7x + 18 ) / ( x + 4 )

Jawaban No 2

f(x) = 3x - 5

g(x) = (x - 1) / (2 - x)

(fog)(x)

= f [ g(x) ]

= 3 ( (x - 1) / (2 - x) ) - 5

= ( ( 3x - 3 ) / ( 2 - x ) ) - 5

= ( ( 3x - 3 ) / ( 2 - x ) ) - ( (5 (2 - x) / (2 - x) )

= ( ( 3x - 3 - ( 10 - 5x ) ) / ( 2 - x )

= ( 8x - 13 ) / ( 2 - x )

= ( 8x - 13 ) / ( - x + 2 )