Maths-
General
Easy

Question

Assertion : If a, b, c are distinct and x, y, z are not all zero given that ax + by + cz = 0, bx + cy + az = 0, cx + ay + bz = 0 then a + b + c not equal to 0
Reason : a2 + b2 + c2 > ab + bc + ca if a, b, c are distinct

  1. If both (A) and (R) are true, and (R) is the correct explanation of (A).    
  2. If both (A) and (R) are true but (R) is not the correct explanation of (A).    
  3. If (A) is true but (R) is false.    
  4. If (A) is false but (R) is true.    

The correct answer is: If (A) is false but (R) is true.

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Assertion : If A is a skew symmetric of order 3 then its determinant should be zero.
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Assertion : If A is a skew symmetric of order 3 then its determinant should be zero.
Reason : If A is square matrix then det A = det A to the power of straight prime = det (–A to the power of straight prime)

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Assertion : There are only finitely many 2 ×2 matrices which commute with the matrix open square brackets table row 1 2 row cell negative 1 end cell cell negative 1 end cell end table close square brackets
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Assertion : There are only finitely many 2 ×2 matrices which commute with the matrix open square brackets table row 1 2 row cell negative 1 end cell cell negative 1 end cell end table close square brackets
Reason : If A is non-singular then it commutes with I, Adj A and A–1.

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Let a matrix A =open square brackets table row 1 1 row 0 1 end table close square brackets & P =open square brackets table row cell fraction numerator square root of 3 over denominator 2 end fraction end cell cell fraction numerator 1 over denominator 2 end fraction end cell row cell negative fraction numerator 1 over denominator 2 end fraction end cell cell fraction numerator square root of 3 over denominator 2 end fraction end cell end table close square brackets Q = PAPT where PT is transpose of matrix P. Find PT Q2005 P is

Let a matrix A =open square brackets table row 1 1 row 0 1 end table close square brackets & P =open square brackets table row cell fraction numerator square root of 3 over denominator 2 end fraction end cell cell fraction numerator 1 over denominator 2 end fraction end cell row cell negative fraction numerator 1 over denominator 2 end fraction end cell cell fraction numerator square root of 3 over denominator 2 end fraction end cell end table close square brackets Q = PAPT where PT is transpose of matrix P. Find PT Q2005 P is

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Let A = open square brackets table row 1 0 0 row 0 1 1 row 0 cell negative 2 end cell 4 end table close square brackets & I = open square brackets table row 1 0 0 row 0 1 0 row 0 0 1 end table close square brackets and A1 = fraction numerator 1 over denominator 6 end fraction [A2 + cA + dI], find ordered pair (c, d) ?]

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If A = open square brackets   table row alpha 0 row 1 1 end table   close square brackets, B = open square brackets   table row 1 0 row 5 1 end table   close square brackets and A2 = B, then

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If A = open square brackets table row 1 0 row 1 1 end table close square brackets and I =open square brackets table row 1 0 row 0 1 end table close square brackets , then which one of the following holds for all n greater or equal than 1, by the principle of mathematical induction -

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If A2 – A + I = 0, then the inverse of A is

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Let A = open parentheses table row 0 0 cell negative 1 end cell row 0 cell negative 1 end cell 0 row cell negative 1 end cell 0 0 end table close parentheses. The only correct statement about the matrix A is

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Bleaching powder has the molecular formula:

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