Algebra Practice Question and Answer

Q:

If $$ {x^{2}+3{x}+1=0}$$, then the value of $$ {x^{3}+{1\over {x^{3}}}}$$

1572 0

  • 1
    -18
    Correct
    Wrong
  • 2
    18
    Correct
    Wrong
  • 3
    36
    Correct
    Wrong
  • 4
    -36
    Correct
    Wrong
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Answer : 1. "-18"

Q:

Value of $$ \sqrt{6+\sqrt {6+\sqrt {6+....}}}$$

1569 0

  • 1
    5
    Correct
    Wrong
  • 2
    4
    Correct
    Wrong
  • 3
    3
    Correct
    Wrong
  • 4
    2
    Correct
    Wrong
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Answer : 3. "3"

Q:

If $$ {x=a^{2\over3}-a^{-2\over3}}$$ then the value of $$ {x^{3}+3x}$$.

1560 0

  • 1
    $$ {a^2-{1\over{a^{2}}}}$$
    Correct
    Wrong
  • 2
    $$ {a^2+{1\over{a^{2}}}}$$
    Correct
    Wrong
  • 3
    $$ {a+{1\over a}}$$
    Correct
    Wrong
  • 4
    $$ {a-{1\over a}}$$
    Correct
    Wrong
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Answer : 1. "$$ {a^2-{1\over{a^{2}}}}$$"

Q:

If $$ x={\sqrt3\over{2}}$$ then the value of $$ \sqrt{1+x}-\sqrt{1-x}$$ will be

1543 0

  • 1
    1
    Correct
    Wrong
  • 2
    0
    Correct
    Wrong
  • 3
    $$ \sqrt{3}$$
    Correct
    Wrong
  • 4
    $$ \sqrt{2}$$
    Correct
    Wrong
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Answer : 1. "1"

Q:

If $$ {4p\over{{p^2}}-4p+4}={1\over8}$$, p≠0 then the value of $$ {p+{4\over p}}$$

1528 0

  • 1
    34
    Correct
    Wrong
  • 2
    37
    Correct
    Wrong
  • 3
    36
    Correct
    Wrong
  • 4
    35
    Correct
    Wrong
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Answer : 3. "36"

Q:

If $$ {x^{12}+x^{3}\over {x^{6}}}=0$$ find $$ {x^{36}+{1\over x^{36}}}$$

1527 0

  • 1
    2
    Correct
    Wrong
  • 2
    0
    Correct
    Wrong
  • 3
    1
    Correct
    Wrong
  • 4
    4
    Correct
    Wrong
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Answer : 1. "2"

Q:

If x, y are two positive real number and  $$x^{1/3}=y^{1/4}$$, then which of the following relations is true?

1523 0

  • 1
    $$x=y^3$$
    Correct
    Wrong
  • 2
    $$x^{20}=y^{15}$$
    Correct
    Wrong
  • 3
    $$x^3=y^4$$
    Correct
    Wrong
  • 4
    $$x^3=y$$
    Correct
    Wrong
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Answer : 2. " $$x^{20}=y^{15}$$"

Q:

If x + y + z=1, xy+yz+zx=-26 and x3 + y3+z3=151, then what will be the value of xyz?

1521 0

  • 1
    -18
    Correct
    Wrong
  • 2
    32
    Correct
    Wrong
  • 3
    24
    Correct
    Wrong
  • 4
    – 30
    Correct
    Wrong
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Answer : 3. "24"

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