If Mary inspects every sixth calculator and Nancy inspects every fifth calculator, which calculator will be the first that they both inspect

Proceed as in example 3 in section 6.1 to rewrite the given expression using a single power series whose general term involves xk. ∞ n(n − 1)cnxn − 2 n = 2 − 4 ∞ ncnxn n = 1 + ∞ cnxn n = 0

One integer is 5 more than another. their product is 104. find the integers

This is so hard and it’s for a test