# Find the Sum of n terms of Geometric Sequence a = 3, n = 7, and r =4

**Created By :** Abhinandan Kumar

**Reviewed By :** Phani Ponnapalli

**Last Updated :** Mar 21, 2023

Try our Geometric Sequence Calculator to quickly obtain the Sum of n terms of Geometric Sequence a = 3, n = 7, and r =4 i.e. 16383.0 in the blink of an eye.

## Sum of n terms of Geometric Sequence a = 3, n = 7, and r =4 is 16383.0

Steps to find sum of n terms of geometric sequence:

**sum of n terms of geometric sequence formula:-**

S_{n} = `a*(r^n-1)/(r-1)`

**where:**

- s
_{n}is the sum of n terms - a is first term
- n is total number of terms
- r is common ratio

**Input values are:-**

a = 3

n = 7

r = 4

**Put values into formula**

S_{7} = `a*(r^n-1)/(r-1)`

S_{7} = `3*(4^7-1)/(4-1)`

**S _{7} = 16383.0**

Follow the detailed steps listed below to find the Sum of n terms of Geometric Sequence a = 3, n = 7, and r = 4 to make your calculations faster.

- The initial step is to find out the First Term of Sequence a = 3, Common Ratio r = 4 and n = 7
- Later, substitute the given values in the Sum of n terms in G.P Formula i.e. S
_{n}= a[(r^{n-1})/(r-1)] if r > 1 and r ≠ 1 or S_{n}= a[(1 – r^{n})/(1 – r)] if r < 1 and r ≠ 1 - As in the given case common ratio r is greater than 1 we will use the formula Sn = a[(r
^{n-1})/(r-1)] and substitute given values i.e. S_{6}= 3[(4^{7-1})/(4-1)] - Simplifying further we have the Sum of n terms of Geometric Sequence S6= 16383.0.

### Example for Finding Sum of n terms of Geometric Sequence

### FAQs on Sum of n terms in G.P for a = 3, n = 7, and r =4

**1. How to find the Sum of n terms in G.P?**

Sum of n terms in G.P can be found by using the formulas S_{n} = a[(r^{n-1})/(r-1)] if r > 1 and r ≠ 1 or S_{n} = a[(1 – r^{n})/(1 – r)] if r < 1 and r ≠ 1.

**2. What is the sum of n terms in Geometric Sequence a = 3, n = 7, and r =4?**

Sum of n terms in the Geometric Sequence a = 3, n = 7, and r =4 is 16383.0.

**3. How to find the sum of n terms in Geometric Sequence a = 3, n = 7, and r =4 quickly?**

You can take help from our geometric sequence calculator in order to find out the sum of n terms in Geometric Sequence a = 3, n = 7, and r =4 quickly.