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Given ,f(x)= - 2x3 -9x2 -12x +1 ,find the intervals in which function is increasing and decreasing?
[-∞,-2] decreasing and (-2 ,-1) increasing
(-2 ,-1) decreasing
(-2 ,-1) strictly decresing
None of these
D f(x)/dx = -6x2 -18x -12
At dfx/dx =0
X2 +3x +2 =0
X ? (-2 ,-1)
By: bhavesh kumar singh ProfileResourcesReport error
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