Question

The sum of the geometric sequence is given as $S=\frac{a(1-r^n)}{1-r}$, where $r$ is the

• A. constant
• B. term
• C. common difference
• D. common ratio

Answer 1

The correct option is D common ratio

We know $S=\frac{a(1-r^n)}{1-r}$

In a geometric sequence, the ratio of terms is constant and is known as the common ratio $\left(r\right)$.

So, in the formula for summation, $r$ is common ratio.