Algebra Question with answer Practice Question and Answer

Q:

рдирд┐рдореНрдирд▓рд┐рдЦрд┐рдд рд╕рдореАрдХрд░рдг рдХреЛ рд╣рд▓ рдХреАрдЬрд┐рдПред

$$ (1-{1\over3})(1-{1\over4})(1-{1\over5})......(1-{1\over n})$$

766 0

  • 1
    $$ 1\over{n}$$
    Correct
    Wrong
  • 2
    $$ 2\over{n}$$
    Correct
    Wrong
  • 3
    $$ 2(n-1)\over{n}$$
    Correct
    Wrong
  • 4
    $$ 2\over{n(n+1)}$$
    Correct
    Wrong
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Answer : 2. "$$ 2\over{n}$$"

Q:

рдпрджрд┐┬а$$ \sqrt {x^2+y^2}=25$$, ┬ардФрд░┬аy=2x, ┬ард╣реИ рддреЛ┬а┬аx┬ардХрд╛ рдорд╛рди рд╣реИред

1095 0

  • 1
    5
    Correct
    Wrong
  • 2
    25
    Correct
    Wrong
  • 3
    $$ \sqrt {125}$$
    Correct
    Wrong
  • 4
    $$ \sqrt {5}$$
    Correct
    Wrong
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Answer : 3. "$$ \sqrt {125}$$"

Q:

рдпрджрд┐┬аx тАУ y + z = 15, xyz = -216┬ардФрд░┬аxz тАУ xy тАУ yz = 18┬ард╣реИ рддреЛ┬а$$ {x^3}-{y^3}+{z^3}=$$┬ардЗрд╕рдХрд╛ рдорд╛рди рд╣реЛрдЧрд╛

903 0

  • 1
    2613
    Correct
    Wrong
  • 2
    2813
    Correct
    Wrong
  • 3
    3013
    Correct
    Wrong
  • 4
    3213
    Correct
    Wrong
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Answer : 4. "3213"

Q:

рдпрджрд┐┬а0.4 m + 0.8 n = 2.2┬ардФрд░┬а0.8 m + 0.4 n = 1.4,┬ард╣реЛ,┬арддреЛ┬а$$ {m^2}+{n^2}$$рдХрд╛ рдорд╛рди рдХреНтАНрдпрд╛ рд╣рд╛реЗрдЧрд╛?

896 0

  • 1
    8.5
    Correct
    Wrong
  • 2
    6.5
    Correct
    Wrong
  • 3
    16
    Correct
    Wrong
  • 4
    9
    Correct
    Wrong
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Answer : 2. "6.5"

Q:

рдпрджрд┐┬а$$ {x^2} -4x-1 $$┬а┬ард╣реИ рддреЛ рдЗрд╕рдХрд╛┬а$$ {{x^6} -{x^4}+{x^2}-1}\over {x^3}$$ ┬ардорд╛рди рд╣реЛрдЧрд╛

735 0

  • 1
    72
    Correct
    Wrong
  • 2
    76
    Correct
    Wrong
  • 3
    80
    Correct
    Wrong
  • 4
    84
    Correct
    Wrong
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Answer : 1. "72"

Q:

$$ m+{1\over m-2}=0$$рд╣реЛ рддреЛ рдХрд╛┬а$$ (m-2)^{12}+{1\over{(m-2)}^{12}} $$ ┬ардорд╛рди рд╣реЛрдЧрд╛тАФ

2109 2

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

Q:

рдпрджрд┐┬а$$ {x+{1\over{x}}}$$,┬ард╣реИ рддреЛ рдХрд╛┬а$$ {x^2}+{1\over{x^2}}$$┬ардорд╛рди рд╣реЛрдЧрд╛ред

1282 0

  • 1
    9
    Correct
    Wrong
  • 2
    7
    Correct
    Wrong
  • 3
    11
    Correct
    Wrong
  • 4
    14
    Correct
    Wrong
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Answer : 2. "7"

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