A Show that the sequence 5, 10, 20, 40, ..

MATHEMATICS · Multi-part · A Level · Mathematics · Sequences and series · Sequences and series

Problem

1. a Show that the sequence 5, 10, 20, 40, ... is geometric. (a) Show that the sequence 5, 10, 20, 40, ... is geometric. (b) Find

u_n

, and hence find the 15th term.