Can 240 be the sum of consecutive terms of an arithmetic sequence '7,11,15, ………..'

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

Write the next two terms of the sequence 7,11,15,……...

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

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

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

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

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.

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

Prove that for any four consecutive. terms of an arithmetic sequence, the sum of the two terms on the two ends and the sum of the two terms in the middle are.the same.

_ ,18,_ ,28 are four consecutive terms of an arithmetic sequence. Fill in the blanks.