# Determine the first and last terms of an arithmetic series with 50 terms, a common difference of 6, and a sum of 7850. Help?

##### 2 Answers

#### Explanation:

Let

Now, the last 50th term of series having

Now, the sum of AP with

Adding (1) & (2), we get

hence, the first & last terms of given AP. are

First term =10 and Last term =304

#### Explanation:

We have No. of terms=50;C.D=6;

using

now putting the values

now again using

**l=last term** =