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If a, b, c, d satisfy the equation a + 7...

If `a, b, c, d` satisfy the equation `a + 7b + 3c + 5d = 0`, `8a + 4b + 6c + 2d = - 16` , `2a + 6b + 4c + 8d =16` , `5a + 3b + 7c + d = -16` then the value of `(a + d) (b + c) =`______

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The correct Answer is:
`-16`
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RESONANCE-EQUATIONS -EXERCISE-1 (PART -1: PRE RMO)
  1. a ne 0, b ne 0. The number of real number pair (a, b) which satisfy t...

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  2. The value of root(3)(5+2sqrt(13)) + root(3)(5-2sqrt(13)) is= ……………..

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  3. If a, b, c, d satisfy the equation a + 7b + 3c + 5d = 0, 8a + 4b + 6c ...

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  4. The combined age of a man and his wife is six times the combined ages ...

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  5. If (x+1)^(2) =x, the value of 11x^(3) + 8x^(2) + 8x -2 is:

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  6. If one root of sqrt(a-x) + sqrt(b+x) = sqrt(a) + sqrt(b) is 2012, th...

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  7. a and b are the roots of the quadratic equation x^2 + lambdax - 1/(2la...

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  8. The remainder obtained when the polynomial x+x^(3)+x^(9)+x^(27)+x^(81)...

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  9. If x, y are positive real numbers satisfying the system of equations x...

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  10. If a, b, c are positive integers such that a^2+ 2b^2-2ab = 169 and 2bc...

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  11. P = 2008^(2007) - 2008, Q = 2008^(2) + 2009. The remainder when P is d...

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  12. The number of integer values of a for which x^2+ 3ax + 2009 = 0 has tw...

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  13. The sum of the fourth powers of the roots of the equation x^(3)- x^(2)...

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  14. If the roots of x^(5) - 40 x^(4) + Px^(3) + Qx^(2) + Rx + S = 0 are in...

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  15. The number of solutions (x, y) where x and y are integers, satisfying ...

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  16. If (p )/(a) + (q)/(b) = (r)/(c) = 1 and (a )/(p )+ (b)/(q) + (c)/(r) =...

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  17. A cubic polynomial P is such that P(1) = 1, P(2) = 2, P(3) = 3 and P(...

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  18. Which of the following is the best approximation to ((2^(3)-1) (3^(3)-...

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  19. Given that (1-x) (1+x+x^(2) +x^(3) +x^(4)) = 31/32 and x is a rational...

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  20. Solve the equation 3x^(4) -10x^(3) + 4x^(2) -x-6=0 one root being (1+s...

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