Q.If \(α\) and \(β\) are the roots of the equation \(3x^2 + 8x + 2 = 0\), find the value of \(\cfrac{1}{α} + \cfrac{1}{β}\). (a) \(-\cfrac{3}{8}\) (b) \(\cfrac{2}{3}\) (c) -4 (d) 4
Answer: C
\(\alpha+\beta=-\cfrac{8}{3}\) and \(\alpha \beta=\cfrac{2}{3}\)
\(\therefore \cfrac{1}{\alpha}+\cfrac{1}{\beta}=\cfrac{\beta+\alpha}{\alpha\beta}= \cfrac{-\cfrac{8}{3}}{\cfrac{2}{3}}\)
\(\therefore =-\cfrac{8}{3}\times \cfrac{3}{2}=-4\)
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