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If `a , b in [0,2pi]` and the equation `x^2+4+3sin(a x+b)-2x=0` has at least one solution, then the value of `(a+b)` can be `(7pi)/2` (b) `(5pi)/2` (c) `(9pi)/2` (d) none of these

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The correct Answer is:
3pi'/2
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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Section -G (Integer Answer type questions)
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