Solve the given inequality (a related function is graphed).-x2 + 3x ? -7x + 21 x-intercepts: (3, 0), (7, 0)

A. (3, 7) ? (7, ?)
B. (-?, 3] ? [7, ?)
C. [3, 7]
D. (-?, -3) ? (7, ?)


Answer: B

Mathematics

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A.
B. ?
C. ?
D. ?
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Use a computer or graphing calculator to find the one-sided limit. Begin by plotting the function in an appropriate window. Your computer may indicate that the limit does not exist, but, if so, you should be able to interpret the answer as either ? or -?.

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