Hi I have a problem with sequences and series. Can anybody help, please? The question is For the sequence U1, U2, U3, ....Un... the terms are related by Un = Un-1 +2Un-2 where n is greater or equal to 1, U1=2 and U2 =5. Find the values of U7, U11, and U14. Can someone explain to me how to do it? Thanks!!