Page 55 - BUKU ARA

1   1  x

 x

(gof )(x )  g ( f (x ))

 1 f (x )
1  1  x
Berdasarkan a dan b ( fog )(x )  (gof )(x )

1

2
3. f (x )  , g (x )  1 x

2 x
Jawab :
( fog )(x )  f (g (x ))

1


2 g (x )
1


2  1 x 2

(gof )(x )  g ( f (x ))

 1 f 2 (x )

 1  2

 1  
 2  x 

 1 
 1   
  44 x  x 2 

3  4x  x 2

4  4x  x 2

Berdasarkan a dan b ( fog )(x )  (gof )(x )

50