Advanced MathEasyPositive input for a given output of a squaring function
Advanced Math practice question
The function f is defined by f(x) = x². What positive value of x gives f(x) = 16?
Answer: 4
x² = 16 and x > 0, so x = 4.
Common wrong answers
- If you answered 8
- 8 halves 16.
- If you answered 256
- 256 is 16².
- If you answered -4
- −4 also gives 16 but is not positive.
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