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Black Book Advanced Problems in MathematicsMathematicsQuadratic Equation

**(A)** If a, b are the roots of equation x^2 + ax + b = 0 ( a, b R ), then the number of ordered pairs (a, b) is equal to **(P)** 1 **(B)** If P = cosec 8 + cosec 2 8 + cosec 3 8 + cosec 13 8 + cosec 14 8 + cosec 15 8 and Q = 8 18 5 18 7 18 , then P + Q is equal to **(Q)** 2 **(C)** Let a₁, a₂, a₃ ...... be positive terms of a G.P. and a₄, 1, 2, a₁₀ are the consecutive terms of another G.P. If _ i=2 ¹² a_i = 4^n whe

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