Question

Determine all intervals on which f, left bracket, x, right bracket, is greater than or equal to, 0, .f(x)≥0.

Answer 1

[-8, 3] ∪ [7, ∞)

Explanation:

You want to know the intervals on which the given graph is on or above the x-axis.

Greater than or equal to 0

The graph is on or above the x-axis between x=-8 and x=3, and again for values of x greater than or equal to 7.

f(x) ≥ 0 on [-8, 3] ∪ [7, ∞)

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