Did you see that as n increases in value, the expression (1 ++)"gets closer and closer to the value of approximately 2.7182818284590452353602874713527?< br /> Now, use you calculator to find the value of e.
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Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.