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Question
If the equation 4x2 – 3kx + 1 = 0 has equal roots then k = ?
Options
`± 2/3`
`± 1/3`
`± 3/4`
`± 4/3`
MCQ
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Solution
`bb(± 4/3)`
Explanation:
It is given that the roots of the equation (4x2 – 3kx + 1 = 0) are equal.
∴ (b2 – 4ac) = 0
⇒ (3k)2 – 4 × 4 × 1 = 0
⇒ 9k2 = 16
⇒ `k^2 = 16/9`
⇒ `k = ± 4/3`
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