Algebra Practice Question and Answer

Q:

यदि a+b+c=15 और a2+b2+c2=83 है, तो a3+b3+c3-3abc का मान ज्ञात करें 

1898 0

  • 1
    190
    Correct
    Wrong
  • 2
    210
    Correct
    Wrong
  • 3
    200
    Correct
    Wrong
  • 4
    180
    Correct
    Wrong
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Answer : 4. "180"

Q:

यदि $$ \ {xy\over x+y}= a, $$ $${xz\over x+z}=b $$ and $$ {yz\over y+z} =c $$ है, जहाँ a, b, c सभी अशून्य संख्याऐ है, तो x का मान किसके बराबर है ?

1895 0

  • 1
    $$ 2abc\over {ab+bc-ac} $$
    Correct
    Wrong
  • 2
    $$ 2abc\over {ab+ac-ac} $$
    Correct
    Wrong
  • 3
    $$ 2abc\over {ac+bc-ab} $$
    Correct
    Wrong
  • 4
    $$ 2abc\over {ac+bc-ac} $$
    Correct
    Wrong
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Answer : 3. "$$ 2abc\over {ac+bc-ab} $$"

Q:

x का न्यूनतम मान ज्ञात करें जो समीकरण x3-7x2+11x - 5 ≥ 0 को संतुष्ट करें ।

1875 0

  • 1
    1
    Correct
    Wrong
  • 2
    - 3
    Correct
    Wrong
  • 3
    0
    Correct
    Wrong
  • 4
    5
    Correct
    Wrong
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Answer : 1. "1"

Q:

यदि  a=x+y, b=x-y, c=x+2y है तो $$ {a^2+b^2+c^2}-ab-bc-ca $$ का मान है

1870 0

  • 1
    $${4y^2}$$
    Correct
    Wrong
  • 2
    $${5y^2}$$
    Correct
    Wrong
  • 3
    $${6y^2}$$
    Correct
    Wrong
  • 4
    $${7y^2}$$
    Correct
    Wrong
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Answer : 4. "$${7y^2}$$"

Q:

सरलीकरण किजिए

1858 0

  • 1
    3/2
    Correct
    Wrong
  • 2
    5/2
    Correct
    Wrong
  • 3
    7/2
    Correct
    Wrong
  • 4
    11/2
    Correct
    Wrong
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Answer : 3. "7/2"

Q:

यदि x2+y2+z2 = xy + yz + zx,  है, तो $${3x^4+7y^4+5z^4}\over{5x^2y^2+7y^2z^2+3z^2x^2} $$ का मान ज्ञात करें।

1848 0

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

Q:

यदिx  = 2  है तो का $$ x^3 + 27x^2 + 243x + 631$$ मान है।

1815 0

  • 1
    1211
    Correct
    Wrong
  • 2
    1231
    Correct
    Wrong
  • 3
    1233
    Correct
    Wrong
  • 4
    1321
    Correct
    Wrong
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Answer : 3. "1233"

Q:

यदि a\b + b\a =1, तो a3+b3 कितना होगा ?

1810 0

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

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