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If tan ^-1 (a/x) + tan ^-1 (b/x) =π/2 then x is equal to (a) √ab (b) √2ab (c) 2ab (d) ab

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If tan -1(a/x) + tan -1(b/x) =π/2 then x is equal to
(a) √ab (b) √2ab (c) 2ab (d) ab

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If tan -1(a/x) + tan -1(b/x) =π/2 then x is equal to

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