A sequence is defined by un=3n-2. find u27

I think the definition of your sequence is u (n) = 3n - 2.

That little set of parentheses makes it SO much

easier to read and understand.

To find u (any number) just write the number in place of 'n'.

u (27) = 3 (27) - 2

= 81 - 2

= 79.