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If the domain of the function 

f(x) = loge (4x2 + 11x + 6) + sin-1 

(4x+3) + cos-1 (10x+6/3) is (α,β]

Then 36 |a + b| is equal to : 

(1) 63 

(2) 45 

(3) 72 

(4) 54

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