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If x_(1), x_(2), x_(3), x_(4) are positive roots of the equation x^(4)-8x^(3)+ax^(2)-bx+16=0 then tan^(-1)(x_(1))+tan^(-1)(x_(2))+tna^(-1)(x_(3))+tan^(-1)(x_(4)) can be equal to |
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Answer» `pi+4 TAN^(-1)(2)` |
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