Arithmetic Prog...

Write first four terms of the AP, when the first term $$a$$ and the common difference $$d$$ are given as follows:

For the following AP, write the first term and the common difference

Is it an AP?

$$1, 4, 7, 10, 13, 16, 19, 22, 25, ...$$

Check if the sequence is an AP $$1, 3, 9, 27,....$$

$$11^{th}$$ term of the AP: $$-3,$$ $$-\dfrac{1}{2}, 2,...$$ is

Find the sums given below:
7 + 10$$\displaystyle\frac{1}{2}$$ + 14 +......+84

Find the number of terms in each of the following AP's
$$7, 13, 19,....205$$

Find the sum of $$2, 7, 12, ...$$to $$10$$ terms

Find the sum of $$-37, -33, -29,..$$ to $$12$$ terms

For an A.P. $$a = 7, d = 3, n = 8$$, find $$a_8$$.