Advertisements
Advertisements
Question
Find second and third terms of an A.P. whose first term is – 2 and the common difference is – 2.
Advertisements
Solution
a = t1 = – 2, d = – 2
∴ t2 = t1 + d = – 2 – 2 = – 4
t3 = t2 + d = – 4 – 2 = – 6
APPEARS IN
RELATED QUESTIONS
If the sum of first 7 terms of an A.P. is 49 and that of its first 17 terms is 289, find the sum of first n terms of the A.P.
If the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their 9th terms.
Find the sum of all integers between 50 and 500, which are divisible by 7.
Find the sum of the first 15 terms of each of the following sequences having the nth term as
yn = 9 − 5n
The 8th term of an AP is zero. Prove that its 38th term is triple its 18th term.
Find the sum of the first n natural numbers.
If (2p – 1), 7, 3p are in AP, find the value of p.
How many terms of the AP 21, 18, 15, … must be added to get the sum 0?
The fourth term of an A.P. is 11. The sum of the fifth and seventh terms of the A.P. is 34. Find its common difference.
Find four consecutive terms in an A.P. whose sum is 12 and sum of 3rd and 4th term is 14.
(Assume the four consecutive terms in A.P. are a – d, a, a + d, a +2d)
If the common differences of an A.P. is 3, then a20 − a15 is
The first term of an A. P. is 5 and the common difference is 4. Complete the following activity and find the sum of the first 12 terms of the A. P.
a = 5, d = 4, s12 = ?
`s_n = n/2 [ square ]`
`s_12 = 12/2 [10 +square]`
`= 6 × square `
` =square`
In an A.P., the sum of first ten terms is −150 and the sum of its next ten terms is −550. Find the A.P.
The first and last term of an A.P. are a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \[\frac{l^2 - a^2}{k - (l + a)}\] , then k =
If the first term of an A.P. is a and nth term is b, then its common difference is
Find the sum of first 20 terms of an A.P. whose first term is 3 and the last term is 57.
Write the formula of the sum of first n terms for an A.P.
In a ‘Mahila Bachat Gat’, Sharvari invested ₹ 2 on first day, ₹ 4 on second day and ₹ 6 on third day. If she saves like this, then what would be her total savings in the month of February 2010?
Three numbers in A.P. have the sum of 30. What is its middle term?
The sum of n terms of an A.P. is 3n2. The second term of this A.P. is ______.
