# OH!! this A.P. is really interesting????

**Algebra**Level 2

The first and last term of an A.P. are 'a' and 'l' respectively.If 'S' is the sum of all the terms of the A.P. and the common difference is given \frac{l^2 - a^2}{k - (l + a)} then find the value of k in terms of 'S' (After getting the value of k put the S=1 ex. 101S then 101+1=102)