16Hit1600
Advanced MathEasy–MediumDifference of two values of a square-root function

Advanced Math practice question

The function h is defined by h(x) = √(2x + 1). What is the value of h(12) − h(4)?

Answer: 2

h(12) = √25 = 5 and h(4) = √9 = 3, so the difference is 2.

Common wrong answers

If you answered 4
4 is √16, taking the root of the difference 25 − 9.
If you answered 5
5 is h(12) alone.
If you answered 8
8 is 12 − 4, the difference of the inputs.

More Advanced Math questions

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