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1. If x is an odd integer, which of the following must be an even integer?
- A. 2x-1
- B. 2x-1
- C. 2x-1
- D. 2x-1
Answer: Option C
Explanation:
let, x is an odd integer i.e. x=1,3,5,…
now if x=1, 5x+1=5*+1=6 is an even integer
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