Advertisements
Advertisements
प्रश्न
Write an A.P. whose first term is a and common difference is d in the following.
a = –19, d = –4
Advertisements
उत्तर
a = –19, d = –4
t1 = a = –19
t2 = a + d = –19 + (–4) = –19 – 4 = –23
t3 = a + 2d = –19 + 2(–4) = –19 – 8 = –27
t4 = a + 3d = –19 + 3(–4) = –19 – 12 = –31
∴ A.P. is –19, –23, –27, –31, .......
APPEARS IN
संबंधित प्रश्न
Find the 9th term from the end (towards the first term) of the A.P. 5, 9, 13, ...., 185
How many terms of the A.P. 65, 60, 55, .... be taken so that their sum is zero?
Determine the A.P. whose 3rd term is 16 and the 7th term exceeds the 5th term by 12.
Find the sum of the following arithmetic progressions:
41, 36, 31, ... to 12 terms
Find the sum of the following arithmetic progressions:
`(x - y)/(x + y), (3x - 2y)/(x + y), (5x - 3y)/(x + y),...` to n terms
The first term of an A.P. is 5, the last term is 45 and the sum of its terms is 1000. Find the number of terms and the common difference of the A.P.
Find the three numbers in AP whose sum is 15 and product is 80.
If `4/5`, a, 2 are in AP, find the value of a.
The sum of the first n terms of an AP is `((5n^2)/2 + (3n)/2)`. Find the nth term and the 20th term of this AP.
Choose the correct alternative answer for the following question .
What is the sum of the first 30 natural numbers ?
If the sum of a certain number of terms starting from first term of an A.P. is 25, 22, 19, ..., is 116. Find the last term.
If the sum of n terms of an A.P. is Sn = 3n2 + 5n. Write its common difference.
Let Sn denote the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = Sn − kSn−1 + Sn−2, then k =
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 =
Q.10
If the second term and the fourth term of an A.P. are 12 and 20 respectively, then find the sum of first 25 terms:
If ₹ 3900 will have to be repaid in 12 monthly instalments such that each instalment being more than the preceding one by ₹ 10, then find the amount of the first and last instalment.
If the nth term of an AP is (2n + 1), then the sum of its first three terms is ______.
Calculate the sum of 35 terms in an AP, whose fourth term is 16 and ninth term is 31.
