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Published on: 24/08/2019
Integral Calculus – I
Download Tamil Nadu 12th Standard Business Maths and Statistics question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
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1.
\(\int _{ 1 }^{ 4 }{ f\left( x \right) } dx,\) where f(x) = \(\begin{cases} 7x+3\quad if\quad 1\le x\le 3 \\ 8x\quad if\quad 3\le x\le 4 \end{cases}\) is _____________.
58
60
62
52
2.
\(\int _{ 0 }^{ 1 }{ \frac { 1 }{ 2x-3 } } \) dx = ____________
\(\frac { 1 }{ 2 } log3\)
\(-\frac { 1 }{ 2 } log3\)
\(\frac { 1 }{ 2 } log1\)
0
3.
\(\int _{ -\frac { \pi }{ 2 } }^{ \frac { \pi }{ 2 } }{ sinx } dx=\)
1
2
-1
-2
4.
∫ e3 log x (x4 +1)-1 dx = ____________ +c
\(\log { \left| { x }^{ 4 }+1 \right| } \)
\(4\log { \left| { x }^{ 4 }+1 \right| } \)
-4 log |x4 +1|
\(\frac { 1 }{ 4 } \log { \left| { x }^{ 4 }+1 \right| } \)
5.
\(\int { \frac { 2 }{ { \left( { e }^{ x }+{ e }^{ -x } \right) }^{ 2 } } } \) dx = ____________ +c
\(\frac { { -e }^{ -x } }{ { e }^{ x }+{ e }^{ -x } } \)
\(-\frac { { -e }^{ -x } }{ { e }^{ x }+{ e }^{ -x } } \)
\(\frac { 1 }{ { \left( { e }^{ x }+1 \right) }^{ 2 } } \)
\(\frac { 1 }{ { e }^{ x }-{ e }^{ -x } } \)
6.
\(\int { { \left| x \right| }^{ 3 } } \)dx = ________________ +c
\(\frac { { -x }^{ 4 } }{ 4 } \)
\(\frac { { \left| x \right| }^{ 4 } }{ 4 } \)
\(\frac { { x }^{ 4 } }{ 4 } \)
none of these
7.
If \(\int { \frac { { 2 }^{ \frac { 1 }{ x } } }{ { x }^{ 2 } } } dx=k{ 2 }^{ \frac { 1 }{ x } }\) +c, then k is ___________
\(-\frac { 1 }{ { log }_{ e }2 } \)
- loge2
-1
\(\frac { 1 }{ 2 } \)
8.
\(\int { \left( x-1 \right) } { e }^{ -x }\) dx = __________ +c
-xex
xex
-xe-x
xe-x
9.
\(\int _{ 0 }^{ \infty }{ { x }^{ 4 }{ e }^{ -x } } \)dx is _______.
12
4
4!
64
10.
If \(\int _{ 0 }^{ 1 }{ f(x) } dx=1,\int _{ 0 }^{ 1 }{ xf(x) } dx=a\) and \(\int _{ 0 }^{ 1 }{ { x }^{ 2 }f(x) } dx={ a }^{ 2 }\), then \(\int _{ 0 }^{ 1 }{ { (a-x) }^{ 2 } } f(x)\) dx is _______.
4a2
0
2a2
1
11.
The value of \(\int _{ -\frac{\pi}{2}}^{ \frac{\pi}{2}}\) cos x dx is _______.
0
2
1
4
12.
\(\int _{ 2 }^{ 4 }{ \frac { dx }{ x } } \) is _______.
log 4
0
log 2
log 8
13.
ഽ\(\frac { { e }^{ x } }{ { e }^{ x }+1 } \) dx is _______.
log\(\left| \frac { { e }^{ x } }{ { e }^{ x }+1 } \right| +c\)
log\(\left| \frac { { e }^{ x }+1 }{ { e }^{ x } } \right| +c\)
log\(\left| { e }^{ x } \right| +c\)
log\(\left| { e }^{ x }+1 \right| +c\)
14.
ഽ\(\frac { { e }^{ x } }{ \sqrt { { 1+e }^{ x } } } \) dx is _______.
\(\frac { { e }^{ x } }{ \sqrt { { 1+e }^{ x } } } +c\)
\(2\sqrt { 1+{ e }^{ x } } +c\)
\(\sqrt { 1+{ e }^{ x } } +c\)
\({ e }^{ x }\sqrt { 1+{ e }^{ x } } +c\)
15.
ഽ\(\frac { 1 }{ { x }^{ 3 } } \)dx is _______.
\(\frac { -3 }{ { x }^{ 2 } } +c\)
\(\frac { -1 }{ 2{ x }^{ 2 } } +c\)
\(\frac { -1 }{ { 3x }^{ 2 } } +c\)
\(\frac { -2 }{ { x }^{ 2 } } +c\)
16.
\(\int _{ 0 }^{ \infty }{ { x }^{ n }{ e }^{ -ax } } \) dx where n is a positive integer
17.
For n > 0, \(\int _{ 0 }^{ \infty }{ { x }^{ n-1 }{ e }^{ -x } } \) dx
18.
\(\int _{ 0 }^{ \infty }{ { e }^{ -t } } dt\quad \)
19.
\(\int _{ 0 }^{ 1 }{ { e }^{ -t } } dt\quad \)
20.
∫ e-t dt
1.
(c)
62
2.
(b)
\(-\frac { 1 }{ 2 } log3\)
3.
(b)
2
4.
(d)
\(\frac { 1 }{ 4 } \log { \left| { x }^{ 4 }+1 \right| } \)
5.
(a)
\(\frac { { -e }^{ -x } }{ { e }^{ x }+{ e }^{ -x } } \)
6.
(d)
none of these
7.
(a)
\(-\frac { 1 }{ { log }_{ e }2 } \)
8.
(c)
-xe-x
9.
(c)
4!
10.
(b)
0
11.
(b)
2
12.
(c)
log 2
13.
(d)
log\(\left| { e }^{ x }+1 \right| +c\)
14.
(b)
\(2\sqrt { 1+{ e }^{ x } } +c\)
15.
(b)
\(\frac { -1 }{ 2{ x }^{ 2 } } +c\)
16.
\(\frac { n! }{ { a }^{ n+1 } } \)
17.
\(\Gamma (n)\)
18.
Improper definite intgral
19.
proper definite integer
20.
Indefinite inegral
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