For , determine the coordinates of the local minimum.
Answer and explanation
Correct answer: B.
- Step 1: gives or .
- Step 2: The cubic has a positive leading coefficient, so the larger turning point is the local minimum: .
Answer
.
Why not the others: : this is the local maximum, not the local minimum. : the coordinates were swapped. : the y-intercept was used as the y-value.
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