Arithmetic Prog...

Find the sum of first $$32$$ multiples of $$4$$.

Constant is subtracted from each term of an A.P. the resulting sequence is also an ______

Find the difference of an A.P. $$a_n$$, if $$a_4 = 16$$ and $$a_2 = 8$$

The last term of the AP  $$21, 18, 15$$ ....... is $$-351$$. Find the nth term.

A train can travel $$200$$ m in the first hour, $$400$$ m the next hour, $$600$$ m the third hour and so on in an arithmetic sequence. What is the total distance the train travels in $$5$$ hours?

Find the sum of first $$20$$ multiples of $$13$$.

Find the sum of the first 20 terms of the arithmetic series if $$a_{1} = 10$$ and $$a_{20}=100$$.

What is the sum of  $$t_n= (2n-5)$$  from n =10 to 150?

Calculate the $$15^{\text{th}}$$ term of the A.P. $$ -3, -4, -5, -6, -7....$$

Find the $$8^{th}$$ term of the A.P. : $$11, 14, 17, 20.....$$