Applicartions Of Derivatives Test
Applicartions Of Derivatives
This is Applicartions of Derivatives Test-05 for CBSE class 12 Maths.. There are 15 questions in this test with each question having around four answer choices.
Questions & Answers
1
Let f (x) = \({({x^2} - 4)^{1/3}}\), then f has a
- Alocal maxima at x = 0
- Bnone of these
- Clocal minima at x = 0Correct
- Dpoint of inflextion at x = 0
2
The function f (x) = \({x^3}\) has a
- Anone of these
- Blocal maxima at x = 0
- Clocal minima at x = 0
- Dpoint of inflexion at = 0Correct
3
The minimum value of (x) =sin x cos x is
- A0
- B\(\frac{1}{2}\)
- Cnone of these.
- D\( - \frac{1}{2}\)Correct
4
The stone projected vertically upwards moves under the action of gravity alone and its motion is described by x = 49 t – 4.9 \({t^2}\) . It is at a maximum height when
- At = 0
- Bnone of these
- Ct = 5Correct
- Dt = 10
5
The function \(f{\text{ }}\left( x \right){\text{ }} = {\text{ }}\left| {{\text{ }}x{\text{ }}} \right|\) has
- Aonly one minimaCorrect
- Bno maxima or minima
- Conly one maxima
- Dnone of these
6
If a differentiable function f (x) has a relative minimum at x = 0, then the function y = f (x) + a x + b has a relative minimum at x = 0 for
- Aall a > 0.
- Ball b > 0
- Call b if a = 0Correct
- Dall a and all b
7
Let f (x) be differentiable in (0, 4) and f (2) = f (3) and S = {c : 2 < c < 3, f’ (c) = 0 } then
- AS has exactly one point
- BS has atleast one pointCorrect
- CS = { }
- Dnone of these
8
Every continuous function is
- Adifferentiable.
- Bnot differentiableCorrect
- Cnot differentiable
- Ddecreasing
9
Rolle’s Theorem is not applicable to the function \(f\left( x \right){\text{ }} = {\text{ }}\left| {{\text{ }}x{\text{ }}} \right|\) for \( - 2 \leqslant x \leqslant 2\) because
- Af (x) is not derivable for x = 0Correct
- Bf ( – 2) = f (2)
- Cnone of these
- Df (x) is continuous for \( - 2 \leqslant x \leqslant 2\) because
10
If \(x \in \left( {0,\frac{\pi }{2}} \right),\) then
- Asin x < x < tan xCorrect
- Btan x < x < sin x
- Cx< sin x < tan x
- Dnone of these
11
Rolle’s theorem is not applicable to function f(x) = | x | in the interval [ – 3, 3] because
- Af is continuous in( – 3, 3)
- B\(f{\text{ }}\left( x \right)0\forall x{\text{ }}in{\text{ }}\left[ {\;--\;3,{\text{ }}3} \right]\)
- Cf is not derivable in ( – 3, 3)Correct
- Df (3) = f ( – 3)
12
For f (x) = \({(x - 1)^{2/3}}\), the mean value theorem is applicable to f (x) in the interval
- Aany finite interval.
- B[2, 4]Correct
- C[0, 2]
- D[ – 2, 2]
13
Let f (x) satisfy the requirements of Lagrange’s mean value theorem in [0, 2] . If f (0) = 0 and f ‘ \((x) \leqslant \frac{1}{2}\) for all in [0, 2], then
- Af (x) = 2 x
- B\(\left| {{\text{ }}f{\text{ }}\left( x \right){\text{ }}} \right| \leqslant 2\)
- Cf (x0 = 3 for atleast one x in [0, 2]
- D\(f{\text{ }}\left( x \right) \leqslant 1\)Correct
14
\(\mathop {\lim }\limits_{x \to \infty } f(x)\), where f (x) = \(\sqrt {\frac{{x - \sin x}}{{x + {{\cos }^2}x}}} \), is equal to
- Anone of these
- B1Correct
- C\(\begin{array}{*{20}{l}} \infty \end{array}\)
- D0
15
For a real number x, let [x] denote the greatest integer less than or equal to x thenf (x) = \(\frac{{\tan (\pi [x - \pi ])}}{{1 + {{[x]}^2}}}\)is
- Acontinuous for some x
- Bcontinuous at all x but f ‘ (x) does not exist
- Cf ‘ (x) exists for all xCorrect
- Df ‘ (x) exists for all x but f ‘’ (x) does not exist