# geometric progression

the 3rd term of a gpis 10 and the 6th term is 80 find the common ratio No2 if the 2nd term of a gp is 4 and the 5th term is 1over 16,the7th term is_

1. 👍
2. 👎
3. 👁
1. a , ar , ar^2 , ar^3 , ar^(n-1)

ar^2 = 10
ar^5 = 80

ar^5 / ar^2 = 8

r^3 = 8

r = 2
======================================
now you do the second one.

1. 👍
2. 👎
2. If first term of a g.p 3 and 4 what is third term

1. 👍
2. 👎
3. A. P.s.Its 5th and 10th
term are
86 and 146 respectively

1. 👍
2. 👎

## Similar Questions

1. ### maths

The 6th term of an A.P is twice the third and the first term is 3. Find the common difference and the 10th term and find the sum of the 1st 10 terms

2. ### maths

The 12th term of exceeds the 3rd term by 36 of an a.p If it's 16th term is 64 find first term and common difference

3. ### Utech

The 6th term of an A.P is twice the third and the first term is 3. Find the common difference and the 10th term.

4. ### math

a GP has a first term of A,a common ratio of r and its 6th term is 768. another GP has a first term of a,a common ratio of 6r and its 3rd term is 3456. evaluate a and r

1. ### Arithmetic Progression

In an AP the 6th term is half the 4th term and the 3rd term is 15. a. Find the fist term and the common difference. b. How many times are needed to give a sum that is less than 65?

2. ### Mathematics

The 3rd and 8th term of an arithmetic progression A.P are -9 and 26.what their common difference nd first term?

3. ### Arithmetic Sequence

Given the third term of an arithmetic sequence less than the fourth term by three. The seventh term is two times the fifth term. Find the common difference and the first term.

4. ### Mathematics

The first term of a GP is 6 if it's common ratio is 2 find the 6th term

1. ### Math

The 3rd and 9th term of a g.p are 54 and 39,336 respectively.find the 6th term,sum of 4th term,sum of 4th and 7th term and product of 2nd and 5th term

2. ### maths

In a gp the 3rd term is 12.and 6th term is 96.then find the sum of nine numbers.

3. ### Math

The fourth term of an arithmetic sequence is less than the fifth term by 3. The seventh term is three times the fifth term. Find the common difference and the first term

4. ### math

The third term of a Gp is 54 & 7th term is reciprocal of 3rd term find the 5th term