Question

If the first term, common ratio and the last term of a G.P. are a, r and `l` respectively, then the nth term from the end of the G.P. is given by:

Options

• $$lr^{n - 1}$$

• $$lr^{1 - n}$$

• $$\frac{l}{r^{1 - n}}$$

• $$\frac{l}{r^{n + 1}}$$

Answer 1

`bb(lr^{1 - n})`

Explanation:

Moving one place backward from the last term divides by $$r$$. Thus, the $$n$$th term from the end is $$\frac{l}{r^{n - 1}} = lr^{1 - n}$$.