How many integers satisfy (x − -5)(x − 7) < 0?
Answer and explanation
Correct answer: D. 11
- Step 1: The product is negative for -5 < x < 7. Step 2. The integers strictly between -5 and 7 number 11. Answer: 11. Why not the others: 12 is what you get if you include one endpoint. 13 is what you get if you include both endpoints. 10 is what you get if you drop one value.
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