Page 146 - EMY SOHILAIT DASAR KALKULUS
P. 146
1 1 π 1
π
2 4 4
1
4π
0 1 0
4. Selesaikan : sin( 2x )dx sin( 2x )d 2 ( ) x
2 / 2 2 /
Penyelesaian :
0 1 0
sin( 2x )dx 2 sin( 2x )d 2 ( ) x
2 / 2 /
1 0
2 cos( 2x )
1 2 /
cos( ) 0 . 2 cos( . 2 ) 2 .
2
1 cos( ) 0 cos( ) 1 1 [ ( 1 )] 1
2 2
3 3 x
5. Selesaikan : e x/2 dx 2 e x/2 d( )
2 2 2
Penyelesaian :
3 3 x
e x/2 dx 2 e x/2 d( )
2 2 2
2[e x/2 ] 2(e 3/2 e 1 )
3
2
2(e e 3/2 )
1
2
6. Selesaikan : x x 2 5 dx
0
Penyelesaian :
2 2
x x 2 5 dx (x 2 5) 1/2 d(x 2 5).(1/2)
0 0
1 1 2 1 2
(x 5) 3/2 (x 5) 3/2
2
2
2 3/2 0 3 0
1 (2 5) 3/2 1 (0 5) 3/2
2
2
3 3
1 (9 3/2 5 3/2 ) 1 (27 5 ) 5 9 5 5
3 3 3
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