How does 3^(k+1)-3+2×3^(k+1) simplify to 3(3^(k+1)-1)?
- Study Helper
© Copyright The Student Room 2017 all rights reserved
The Student Room, Get Revising and The Uni Guide are trading names of The Student Room Group Ltd.
Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE