Limits And Derivatives CBSE Questions & Answers

Limits And Derivatives

This is Mathematics Class 11 Limits and Derivatives CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
\(\mathop {Lt}\limits_{x \to \infty } {{\mathop {\Sigma \;r}\limits_{r = 1}^n } \over {{n^2}}}\) is equal to
  • A
    \({1 \over 3}\)
  • B
    \({1 \over 4}\)
  • C
    \({1 \over 2}\)
    Correct
  • D
    none of these
2
\(\mathop {Lt}\limits_{n \to \infty } {{\mathop \Sigma \limits_{r = 1}^n {r^2}} \over {{n^3}}}\) is equal to
  • A
    none of these
  • B
    \({1 \over 2}\)
  • C
    \({1 \over 4}\)
  • D
    \({1 \over 3}\)
    Correct
3
\(\mathop {Lt}\limits_{x \to 0} \;{1 \over x}\)
  • A
    tends to - \(\infty \)
  • B
    tends to \(\infty \)
  • C
    is equal to 0
  • D
    does not exist
    Correct
4
\(\mathop {Lt}\limits_{x \to 0} \;\;x\left[ x \right]\) is equal to
  • A
    0 or 1
  • B
    0 or – 1
  • C
    none of these
  • D
    0
    Correct
5
\(\mathop {Lt}\limits_{x \to 0} \;\;{{{{(1 + x)}^n} - 1} \over x}\) is equal to
  • A
    n – 1
  • B
    1
  • C
    none of these
  • D
    n
    Correct
6
\(\mathop {Lt}\limits_{n \to \infty } \;\;\left[ {{1 \over {1 - {n^2}}} + {2 \over {1 - {n^2}}} + {3 \over {1 - {n^2}}} + ...{n \over {1 - {n^2}}}} \right]\) is equal to
  • A
    0
  • B
    \( - {1 \over 2}\)
    Correct
  • C
    none of these
  • D
    \({1 \over 2}\)
7
\(\mathop {Lt}\limits_{h \to 0} \;{{{{\sin }^2}(x + h) - {{\sin }^2}x} \over h}\) is equal to
  • A
    sin x cos x
  • B
    sin 2 x
    Correct
  • C
    \({\cos ^2}x\)
  • D
    2 sin x
8
If a is a real number, then \(\mathop {Lt}\limits_{x \to a} \;\;\;{{\left| {x - a} \right|} \over {x - a}}\)
  • A
    does not exist
    Correct
  • B
    is equal to 0
  • C
    is equal to – 1
  • D
    is equal to 0
9
If k be a integer, then \(\mathop {Lt}\limits_{x \to {k^ + }} \;\;(x - \left[ x \right])\) is equal to
  • A
    1
  • B
    0
    Correct
  • C
    none of these
  • D
    -1
10
\(\mathop {Lt}\limits_{x \to {a^ - }^ - } \;\;{{\left| {x - a} \right|} \over {x - a}}\) is equal to
  • A
    1
  • B
    0
  • C
    none of these
  • D
    - 1
    Correct
11
If k be an integer, then \(\mathop {Lt}\limits_{x \to {k^ - }^{}} \;\;(x - \left[ x \right])\) is equal to
  • A
    1
    Correct
  • B
    0
  • C
    none of these
  • D
    -1
12
\(\mathop {Lt}\limits_{x \to 0} \;\;\left( {{{\tan x - x} \over x}} \right)\sin \left( {{1 \over x}} \right)\) is equal to
  • A
    1
  • B
    none of these
  • C
    a real number other than 0 and 1
  • D
    0
    Correct
13
\(\mathop {Lt}\limits_{x \to 3} \;\;{{\sqrt {{x^2} + 10} - \sqrt {19} } \over {x - 3}}\) is equal to
  • A
    none of these
  • B
    \({6 \over {\sqrt {19} }}\)
  • C
    \({3 \over {\sqrt {19} }}\)
    Correct
  • D
    0
14
Maximum value of \({x^3} - 3x + 2in\left[ {0,2} \right]\) is
  • A
    none of these
  • B
    4
    Correct
  • C
    1
  • D
    2
15
\(\mathop {Lt}\limits_{x \to 0 + } {{\sqrt x } \over {\sqrt {16 + \sqrt x } - 4}}\)
  • A
    none of these
  • B
    is equal to 0
  • C
    is equal to 8
    Correct
  • D
    does not exist