Determine the intervals on which the function is increasing

Determine the interval(s) on which the function is increasing A. (-infinity, -1) B. (-infinity, -3) and (1, infinity) C. (-4.5, -1) and (2.5, infinity) D. -2, 2)

Solution

A scrutiny of the graph of the function reveals that the graph isrising in the interval ( -, -3), falling in the interval ( -3,-1) and rising again thereafter in the interval ( 1,). Thus, the function is increasing in the intervals ( -, -3) and ( 1,). Option B is the correct answer.