Question

If a geometric progression (GP) starts at 3.6 and the common ratio (CR) = 1.5, what is the 3rd term?

• A. 7.2
• B. 8.1
• C. 6.0
• D. 6.6

Answer 1

Answer:

B. 8.1

For a geometric progression (GP), the (n)th term is:

$a_n = a \times r^{,n-1}$

Where:

• First term, (a = 3.6)

• Common ratio, (r = 1.5)

• (n = 3)

So,

$a_3 = 3.6 \times (1.5)^2$
$= 3.6 \times 2.25$
$= 8.1$

Answer: $(\boxed{8.1})$