Question

Which statement is true about the given function? f(x) < 0 over the intervals (–, –2.7) and (0.8, ). f(x) < 0 over the intervals (–, –2.7) and (–1, 0.8). f(x) > 0 over the intervals (–, –2.7) and (–1, 0.8). f(x) > 0 over the intervals (–, –1) and (0.8, ).

Answer 1

f(x) < 0 over the intervals (–, –2.7) and

(–1, 0.8). Answer is B

Answer 2

Answer: Option B f(x) < 0 over the intervals (-∞, -2.7) and (-1, 0.8).”

Solution:

From the coordinates (-∞, -2.7) in the graph has negative values of y (because the curve goes below the x-axis)

From (-1 to 0.08) it also has negative values of y (i.e., again the curve decreases below the x-axis).

Therefore, option B is the correct answer “f(x) < 0 over the intervals $(-\infty, -2.7)$ and (-1, 0.8).