Advertisements
Advertisements
प्रश्न
Find second and third terms of an A.P. whose first term is – 2 and the common difference is – 2.
Advertisements
उत्तर
a = t1 = – 2, d = – 2
∴ t2 = t1 + d = – 2 – 2 = – 4
t3 = t2 + d = – 4 – 2 = – 6
APPEARS IN
संबंधित प्रश्न
Find the number of natural numbers between 101 and 999 which are divisible by both 2 and 5.
Find four numbers in A.P. whose sum is 20 and the sum of whose squares is 120
If the nth term of the A.P. 9, 7, 5, ... is same as the nth term of the A.P. 15, 12, 9, ... find n.
In an A.P., if the first term is 22, the common difference is −4 and the sum to n terms is 64, find n.
Find the middle term of the AP 10, 7, 4, ..., (–62).
The 19th term of an AP is equal to 3 times its 6th term. If its 9th term is 19, find the AP.
Write an A.P. whose first term is a and the common difference is d in the following.
a = 10, d = 5
If `4/5` , a, 2 are three consecutive terms of an A.P., then find the value of a.
The first and last terms of an A.P. are 1 and 11. If the sum of its terms is 36, then the number of terms will be
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 =
If the first term of an A.P. is a and nth term is b, then its common difference is
Q.13
Q.14
Q.17
Obtain the sum of the first 56 terms of an A.P. whose 18th and 39th terms are 52 and 148 respectively.
Find whether 55 is a term of the A.P. 7, 10, 13,... or not. If yes, find which term is it.
Find the sum of first seven numbers which are multiples of 2 as well as of 9.
The ratio of the 11th term to the 18th term of an AP is 2 : 3. Find the ratio of the 5th term to the 21st term, and also the ratio of the sum of the first five terms to the sum of the first 21 terms.
Find the sum of first 20 terms of an A.P. whose nth term is given as an = 5 – 2n.
