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

….,18,..., 28 are four consecutive terms of an arithmetic sequence. Fill up the blanks

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.

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

If 3/2, 5/3, 11/6 are the first three terms of an arithmetic sequence, find the first integer term in this sequence.

The sum of the first five terms of an arithmetic sequence is 150 and the'sum of the first ten terms is 550 . i) What is the third term of the sequence? ii) What is the eighth term? iii) What are the first three terms of the sequence?

The sum of first n terms of an arithmetic sequence is n^2+2n What is the first term?

Consider an arithmetic sequence with common difference 20. If the sum of reciprocals of two consecutive terms of this sequence is 1//24 find the first term of the arithmetic sequence .

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.

Sum of the first five terms of an arithmetic sequence is 45. What is the third term? Write the first two terms. Write another arithmetic sequence having the sum of the first five terms as 45.

The sum of the first and 21^(th) terms of an arithmetic sequence is 140 .Write the sequence, If the first term is 10.