Advanced Math practice question

Answer: A. Infinitely many

For every x between 2 and 6 inclusive, the two distances add to exactly 4.

Why the other answers are wrong

B. Two

Every point of the interval [2, 6] works, not just its ends.

C. One

Not just the midpoint.

D. None

x = 3, for instance, gives 1 + 3 = 4.

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