What is the sum of first 2020 terms of the arithmetic sequence `1/2020`,`3/2020`,`5/2020`,.......?

What is the sum of the first n term of the arithmetic sequence 1,3,5,7......?

What is the sum of the first 5 terms of the arithmetic sequence 1,3,5,7,........?

What is the sum ofthe first 5 terms ofthe arithmetic sequence 1, 3, 5, 7,……... ?

Find the sum of the first n terms of the arithmetic sequence 1/n,3/n,5/n,7/n ,.......

Write the first integer term of the arithmetic sequence 1/7,2/7,3/7…

What is the 21^(st) term of the arithmetic sequence 21, 20, 19,......?

What is the sum of first 40 natural numbers? [(1640 , 820 , 410 , 205)] ii) Whât is the sum of first 40 terms of the arithmetic sequences 6,12,18,.....? iii) The sum of first 40 terms of an arithmetic sequence with common difference 6 , is '5120 .' Write down the aigebraic form of this sequence.

Calculate the difference between the sum of the first 20 terms of the arithmetic sequences 6,10,14,….. and 15,19,23,…….

16 added to the sum of the first few terms of the arithmetic sequence 9,11,13, ........... gave 256 . How many terms were added?

What is the difference between the sum of the first 20 terms and.the next 20 terms. of the arithmetic sequence 6,10,14,……..?