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Question: \[\left| \begin{matrix} (a^{x} + a^{- x})^{2} & (a^{x} - a^{- x})^{2} & 1 \\ (b^{x} + b^{- x})^{2} &...

(a^{x} + a^{- x})^{2} & (a^{x} - a^{- x})^{2} & 1 \\ (b^{x} + b^{- x})^{2} & (b^{x} - b^{- x})^{2} & 1 \\ (c^{x} + c^{- x})^{2} & (c^{x} - c^{- x})^{2} & 1 \end{matrix} \right| =$$
A

0

B

2abc2abc

C

a2b2c2a^{2}b^{2}c^{2}

D

None of these

Answer

0

Explanation

Solution

Put −10x+90−42−81+42+9x=0or x=9- 10x + 90 - 42 - 81 + 42 + 9x = 0\text{or}\ x = 9 which gives answer (1).