Showing posts with label CBSE. Show all posts
Showing posts with label CBSE. Show all posts
Tuesday, February 10, 2015

divisibility

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 Let x and y be integers. Prove that (2x + 3y) is divisible by 17 if (9x + 5y) is divisible by 17.
Sunday, October 20, 2013

Simultaneous equation

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If  S = x 2 + y 2 And T = xy Express x and y in terms of S and T
Tuesday, September 17, 2013

logarithm

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Solve:
Friday, September 13, 2013

miscellaneous equations

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Solve for x and y x 2 - xy + y 2 = 39 x 3 + y 3 = 351

miscellaneous equations

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Solve for x and y: x 2 + xy + y 2 = 37 x 3 - y 3 = 37

miscellaneous equations,

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Solve:     x 4 + x 2 y 2 + y 4 = 21  x 2 + xy + y 2 = 7

miscellaneous equations

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Solve the equation: x - y = 1 x 3 - y 3 = 19

miscellaneous equations

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Solve the equations: X 3 + y 3 = 35 X + y = 5

miscellaneous equations

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Solve the equation: X 2 – 25y 2 = 156 X + 5y = 26

making the subject of the equation

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The two expressions                                       and                                             are found by different metho...
Monday, September 2, 2013

algebra

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logarithm

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logarithm

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algebra

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Sunday, September 1, 2013

Rationalization

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Algebra

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if 2/x = 1/a + 1/b then find 1/(x -a)  + 1/ (x -b)

Algebra

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show that: If (a + 1/a)^2 = 3.  a^3 + 1/ a^3 = 0

Algebra

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Prove that {a /(a-b)} + {b/(b-c)} + {c/(c -a)} = 3 - [{a /(a-c)} + {b/(b-a)} + {c/(c -b)}]

factorize

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factorize: (a + b)(a - b) - 4c(a -c)

Arithmetic Progression

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In an AP if the 8th term is twice the 13th, show that the 2nd term is twice the 10th term