Question

10th term: a1 = 320,r=0.5

Answer 1

Answer:

$a_{10}$ = $\frac{5}{8}$

Step-by-step explanation:

The n th term of a geometric sequence is

$a_{n}$ = $a_{1}$ $r^{n-1}$

Substitute in values

$a_{10}$ = 320 × $(\frac{1}{2}) ^{9}$

                         = 320 × $\frac{1}{512}$ = $\frac{320}{512}$ = $\frac{5}{8}$ = 0.625