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(a)<br />
(b)<br />
(c)<br />
(a)<br />
ln 2<br />
<br />
0<br />
e<br />
<br />
1<br />
e<br />
x<br />
<br />
dx<br />
Solution<br />
ln 2<br />
dx<br />
x 2<br />
0 e<br />
1<br />
let y = e x<br />
dy = e x dx<br />
dy<br />
dx =<br />
y<br />
<br />
1<br />
3<br />
x ln x<br />
<br />
2<br />
2<br />
dx<br />
1<br />
e x 22<br />
1 dx<br />
<br />
2<br />
dy<br />
yy<br />
1<br />
1<br />
2<br />
A<br />
y<br />
B<br />
C<br />
2<br />
y<br />
1 y 1<br />
y<br />
1<br />
2<br />
Ay<br />
1 Byy<br />
1 Cy<br />
y<br />
1<br />
<br />
1<br />
y 0 A 1<br />
Ceoff.<br />
of<br />
2<br />
y<br />
<br />
y 1<br />
C 1<br />
1<br />
0 A B B 1<br />
2<br />
dy<br />
2<br />
yy<br />
1<br />
1<br />
2<br />
1 1 1<br />
dy dy <br />
y y 1<br />
<br />
2<br />
y 1<br />
1<br />
2<br />
2<br />
2 1 <br />
ln<br />
y ln<br />
y 1<br />
<br />
1 1 <br />
1<br />
<br />
y 1<br />
1 1<br />
ln 2 ln 1<br />
ln 3 ln 2 <br />
3 2<br />
<br />
<br />
ln<br />
<br />
4 1<br />
3<br />
<br />
6<br />
<br />
6<br />
<br />
2<br />
(b)<br />
<br />
<br />
(c)<br />
3<br />
x<br />
x<br />
3<br />
e<br />
3<br />
x<br />
<br />
ln<br />
2<br />
x<br />
dx<br />
1<br />
dv 3<br />
let x<br />
dx<br />
4<br />
x<br />
V <br />
4<br />
2<br />
U ln<br />
x<br />
du 2<br />
ln x<br />
dx x<br />
2 x 2 x<br />
ln<br />
x dx ln<br />
x <br />
4 4<br />
1 4 2 x<br />
x ln<br />
x <br />
4 <br />
4<br />
1 4 2 x<br />
x ln<br />
x ln x <br />
4<br />
8 <br />
<br />
x<br />
<br />
<br />
4<br />
e<br />
<br />
1<br />
<br />
32<br />
ln x<br />
4<br />
<br />
<br />
2<br />
ln x<br />
dx<br />
<br />
2<br />
4<br />
<br />
2<br />
1 0<br />
4<br />
<br />
4<br />
5 e 1 <br />
1<br />
<br />
let<br />
<br />
<br />
<br />
e<br />
1<br />
4<br />
4<br />
4<br />
x<br />
<br />
<br />
8<br />
1<br />
e x 2<br />
dx<br />
<br />
<br />
let<br />
e<br />
<br />
8<br />
1 <br />
1<br />
<br />
ln x<br />
<br />
x = ln y<br />
e x = y<br />
dy dx<br />
y<br />
1<br />
dy <br />
y <br />
2<br />
1<br />
y 2 <br />
<br />
1<br />
1 y<br />
y u<br />
e<br />
<br />
32<br />
<br />
1<br />
2<br />
2<br />
4<br />
1<br />
e<br />
1<br />
u<br />
dy 2u du<br />
4<br />
2 <br />
ln<br />
x<br />
x <br />
3<br />
ln xdx<br />
2<br />
3<br />
x<br />
dx<br />
8<br />
4<br />
x <br />
<br />
<br />
32 <br />
1<br />
32<br />
e<br />
1<br />
dx<br />
289