## The sum first 9 term of an arithmetic sequence is 90. What is its 5th term

Question

The sum first 9 term of an arithmetic sequence is 90. What is its 5th term

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1 month 2021-08-18T16:36:38+00:00 2 Answers 1 views 0

it’s 50 because if it is 9 term than 90 then 5 means 50 and if this is wrong the sorry because I am studying in 7th STD only

2. Given ,

The sum first 9 term of an arithmetic sequence is 90

We know that , the sum of first n terms of an AP is given by

Thus ,

Now , the 5th term will be

a + (5 – 1)d

a + 4d

10

Therefore ,

• The 5th term of AP is 10