What is the range of ?
Answer and explanation
Correct answer: D.
- Step 1: Since , the smallest value of the function is when , which is .
- Step 2: The function increases without limit, so the range is .
Answer
.
Why not the others: : the parabola opens upwards, so the values go up from the minimum. : the sign of the constant was reversed. : a parabola cannot take every real value.
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