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MCQ Questions for CBSE Class 12 with Answers
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MCQ Questions for CBSE Class 9 with Answers
MCQ Questions for CBSE Class 8 with Answers
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Quiz
CBSE
/
Class 12
/
Maths
/
Continuity and Differentiability
1.
If y = (tan x), then
d
y
d
x
is equal to
sec x + cos x
sec x+ log tan x
(tan x)
None of these
2.
If x= e then
d
y
d
x
is
1
+
x
1
+
l
o
g
x
1
−
l
o
g
x
1
+
l
o
g
y
not defined
−
y
(
1
+
l
o
g
x
)
2
3.
The derivative of y = (1 – x) (2 – x)…. (n – x) at x = 1 is equal to
0
(-1) (n – 1)!
n ! – 1
(-1)
4.
If f(x) = cos x, cos 2 x, cos 4 x, cos 8 x, cos 16 x, then the value of'(
π
4
) is
1
√2
1
√
2
0
5.
x. y= 16, then the value of
d
y
d
x
at (2, 2) is
-1
0
-1
None of these
6.
If y = e find
d
y
d
x
=
y
2
1
−
y
y
2
y
−
1
y
y
−
1
−
y
y
−
1
7.
If x =
1
−
t
2
1
+
t
2
and y =
2
t
1
+
t
2
then
d
y
d
x
is equal to dx
–
y
x
y
x
–
x
y
x
y
8.
If x = a cosθ, y = a sinθ. then
d
y
d
x
at θ =
3
π
4
is
-1
1
-a²
a²
9.
If x = sin(3t – 4t³) and y = cos(
√
1
−
t
2
) then
d
y
d
x
is equal to
1
2
2
5
3
2
1
3
10.
If x = e sin t, y = e cos t, t is a parameter, then
d
y
d
x
at (1, 1) is equal to
–
1
2
–
1
4
0
1
2
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Continuity and Differentiability
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