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Hi I am trying to write a proof but I am a little stuck. The proposition...

Hi I am trying to write a proof but I am a little stuck. The proposition is: If c is greater than or equal to 2 is a composite integer then there exists a positive integer b greater than or equal to 2 such that b|c and b is less than or equal to root. I thought of doing an existence proof but Im not sure what to do after that.

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