SAT Math Multiple Choice Question 681: Answer and Explanation

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Question: 681

6. Let function f(x) be defined by the equation Images. If m is a positive integer, then Images

  • A. Images
  • B. Images
  • C. Images
  • D. 2 - m

Correct Answer: A

Explanation:

A

Algebra (simplifying expressions) MEDIUM-HARD

Images

Substitute Images for x:

Images

Simplify the denominator:

Images

Divide by multiplying by the reciprocal:

Images

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