hard · GMAT Quant

**Forge Bridge case**

The inequality x^2-5x+4≤0 is given.

Which interval is the complete solution?

  1. 1≤ x≤4
  2. x≤1 or x≥4
  3. 1<x<4
  4. x<-1 or x>4
  5. x≤5

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