1.

If the equation x^(2) + 12 + 3 sin (a + bx) + 6x = 0has at least one real solution, when a, b in [0, 2 pi] , then the value of a = 3b is (n in Z)

Answer»

`2 N pi`
`(2 n + 1) pi`
`(4 n - 1) (pi)/(2)`
`(4 n + ) (pi)/(2)`

ANSWER :C


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