CBSE 12th Math (Term 1) Paper 2021-22
Paper was held on Sun, Dec 5, 2021 11:30 AM
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## Mathematics

Differential of $$\log [\log (\log {x^5})]$$ w.r.t. x is
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The number of all possible matrices of order 2 $$\times$$ 3 with each entry 1 or 2 is
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A function f : R $$\to$$ R is defined as f(x) = x3 + 1. Then the function has
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If $$\sin y = x\cos (a + y)$$, then $${{dx} \over {dy}}$$ is
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The points on the curve $${{{x^2}} \over 9} + {{{y^2}} \over {25}} = 1$$, where tangent is parallel to x-axis are
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Three points P(2x, x + 3), Q(0, x) and R(x + 3, x + 6) are collinear, then x is equal to
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The principal value of $${\cos ^{ - 1}}\left( {{1 \over 2}} \right) + {\sin ^{ - 1}}\left( { - {1 \over {\sqrt 2 }}} \ri View Question If$${({x^2} + {y^2})^2} = xy$$, then$${{dy} \over {dx}}$$is View Question If a matrix A is both symmetric and skew symmetric, then A is necessarily a View Question Let set X = {1, 2, 3} and a relation R is defined in X as : R = {(1, 3), (2, 2), (3, 2)}, then minimum ordered pairs whi View Question A Linear Programming Problem is as follows:Minimize z = 2x + ysubject to the constraints x$$\ge$$3, x$$\le$$9, y$$\
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The function $$f(x) = \left\{ {\matrix{ {{{{e^{3x}} - {e^{ - 5x}}} \over x},} & {if\,x \ne 0} \cr {k,} & {if\,x View Question If Cij denotes the cofactor of element pij of the matrix$$P = \left[ {\matrix{ 1 & { - 1} & 2 \cr 0 & 2 & { - 3
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The function $$y = {x^2}{e^{ - x}}$$ is decreasing in the interval
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If R = {(x, y); x, y $$\in$$ Z, x2 + y2 $$\le$$ 4} is a relation in set Z, then domain of R is
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The system of linear equations5x + ky = 5,3x + 3y = 5; will be consistent if
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The equation of the tangent to the curve y (1 + x2) = 2 $$-$$ x, where it crosses the x-axis is
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If $$\left[ {\matrix{ {3c + 6} & {a - d} \cr {a + d} & {2 - 3b} \cr } } \right] = \left[ {\matrix{ {12} & View Question The principal value of$${\tan ^{ - 1}}\left( {\tan {{9\pi } \over 8}} \right)$$is View Question For two matrices$$P = \left[ {\matrix{ 3 & 4 \cr { - 1} & 2 \cr 0 & 1 \cr } } \right]$$and$${Q^T} =
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The function $$f(x) = 2{x^3} - 15{x^2} + 36x + 6$$ is increasing in the interval
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If $$x = 2\cos \theta - \cos 2\theta$$ and $$y = 2\sin \theta - \sin 2\theta$$, then $${{dy} \over {dx}}$$ is
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What is the domain of the function $${\cos ^{ - 1}}(2x - 3)$$ ?
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A matrix $$A = {[{a_{ij}}]_{3 \times 3}}$$ is defined by $${a_{ij}} = \left\{ {\matrix{ {2i + 3j} & , & {i j} \cr View Question If a function f defined by$$f(x) = \left\{ {\matrix{ {{{k\cos x} \over {\pi - 2x}}} & , & {if\,x \ne {\pi \over 2}
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For the matrix $$X = \left[ {\matrix{ 0 & 1 & 1 \cr 1 & 0 & 1 \cr 1 & 1 & 0 \cr } } \right]$$, (X2 $$- View Question Let X = {x2 : x$$\in$$N} and the function f : N$$\to$$X is defined by f(x) = x2, x$$\in$$N. Then this function is View Question The corner points of the feasible region for a Linear Programming problem are P(0, 5), Q(1, 5), R(4, 2) and S(12, 0). Th View Question The equation of the normal to the curve ay2 = x3 at the point (am2, am3) is View Question If A is a square matrix of order 3 and |A| =$$-$$5, then |adj A| is View Question The simplest form of$${\tan ^{ - 1}}\left[ {{{\sqrt {1 + x} - \sqrt {1 - x} } \over {\sqrt {1 + x} + \sqrt {1 - x} }}
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If for the matrix $$A = \left[ {\matrix{ \alpha & { - 2} \cr { - 2} & \alpha \cr } } \right]$$, | A3 | = 1
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If $$y = \sin (m{\sin ^{ - 1}}x)$$, then which one of the following equations is true?
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The principal value of $$[{\tan ^{ - 1}}\sqrt 3 - {\cot ^{ - 1}}( - \sqrt 3 )]$$ is
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The maximum value of $${\left( {{1 \over x}} \right)^{x}}$$ is
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Let matrix $$X = [{x_{ij}}]$$ is given by $$X = \left[ {\matrix{ 1 & { - 1} & 2 \cr 3 & 4 & { - 5} \cr 2 & View Question A function f : R$$\to$$R defined by f(x) = 2 + x2 is View Question A Linear Programming Problem is as follows:Maximize/Minimize objective function Z = 2x$$-$$y + 5Subject to the constra View Question If x =$$-$$4 is a root of$$\left| {\matrix{ x & 2 & 3 \cr 1 & x & 1 \cr 3 & 2 & x \cr } } \right| = 0
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The absolute maximum value of the function $$f(x) = 4x - {1 \over 2}{x^2}$$ in the interval $$\left[ { - 2,{9 \over 2}} View Question In a sphere of radius r, a right circular cone of height h having maximum curved surface area is inscribed. The expressi View Question The corner points of the feasible region determined by a set of constraints (linear inequalities) are P(0, 5), Q(3, 5), View Question If curves y2 = 4x and xy = c cut at right angles, then the value of c is View Question The inverse of the matrix$$X = \left[ {\matrix{ 2 & 0 & 0 \cr 0 & 3 & 0 \cr 0 & 0 & 4 \cr } } \right]\$
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For an L.P.P. the objective function is Z = 4x + 3y, and the feasible region determined by a set of constraints (linear
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In a residential society comprising of 100 houses, there were 60 children between the ages of 10-15 years. They were ins
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In a residential society comprising of 100 houses, there were 60 children between the ages of 10-15 years. They were ins
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In a residential society comprising of 100 houses, there were 60 children between the ages of 10-15 years. They were ins
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In a residential society comprising of 100 houses, there were 60 children between the ages of 10-15 years. They were ins
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In a residential society comprising of 100 houses, there were 60 children between the ages of 10-15 years. They were ins
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