Arithmetic Prog...

In an Arithmetic sequence, $$S_{n}$$ represents the sum to $$n$$ terms, what is $$S_{n} - S_{n - 1}$$?

Find the sum of integers from $$1$$ to $$35$$.

The sum of first n terms of an A.P. is

If $$t_{n}$$ be the $$n^{th}$$ term of the A.P. $$-9, -14, -19, ....,$$ what is the value of $$t_{30} - t_{20}$$?

What is the sum of 12 odd numbers $$1, 3, 5, 7, 9.....?$$

What is the nth term of the arithmetic sequence $$1, 3, 5, 7, 9, 11...?$$

Find the nth term of an arithmetic sequence $$11, 22, 33, 44...$$.

If the $$nth$$ term of AP is $$2n+5$$. Then find the  $$AM$$ of first and last terms.

Obtain the sum of the first $$56$$ terms of an A.P. whose $$28^{th}$$ and $$29^{th}$$ terms are $$52$$ and $$148$$ respectively.

If $$n^{th}$$ term of AP is $$4n+1$$, then AM of $$11^{th}$$ to $$ 20^{ th}$$ terms is