Advertisements
Advertisements
Question
Find the first term and common difference for the A.P.
127, 135, 143, 151,...
Advertisements
Solution
127, 135, 143, 151,...
First term = 127
Common difference = Second term – First term
= 135 – 127
= 8
APPEARS IN
RELATED QUESTIONS
If the sum of the first n terms of an A.P. is `1/2`(3n2 +7n), then find its nth term. Hence write its 20th term.
In an AP, given a = 2, d = 8, and Sn = 90, find n and an.
Find the sum to n term of the A.P. 5, 2, −1, −4, −7, ...,
Find the sum of all integers between 50 and 500, which are divisible by 7.
Find the sum of all integers between 100 and 550, which are divisible by 9.
Determine the A.P. Whose 3rd term is 16 and the 7th term exceeds the 5th term by 12.
Find the sum of 28 terms of an A.P. whose nth term is 8n – 5.
Which term of the AP `5/6, 1, 1 1/6, 1 1/3,` ... is 3?
Find the 6th term form the end of the AP 17, 14, 11, ..., (–40).
Find an AP whose 4th term is 9 and the sum of its 6th and 13th terms is 40.
There are 25 rows of seats in an auditorium. The first row is of 20 seats, the second of 22 seats, the third of 24 seats, and so on. How many chairs are there in the 21st row ?
Find out the sum of all natural numbers between 1 and 145 which are divisible by 4.
If Sn denotes the sum of the first n terms of an A.P., prove that S30 = 3(S20 – S10).
The nth term of an A.P., the sum of whose n terms is Sn, is
The common difference of an A.P., the sum of whose n terms is Sn, is
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:
In an A.P., the sum of its first n terms is 6n – n². Find is 25th term.
The sum of the first 2n terms of the AP: 2, 5, 8, …. is equal to sum of the first n terms of the AP: 57, 59, 61, … then n is equal to ______.
Jaspal Singh repays his total loan of Rs. 118000 by paying every month starting with the first instalment of Rs. 1000. If he increases the instalment by Rs. 100 every month, what amount will be paid by him in the 30th instalment? What amount of loan does he still have to pay after the 30th instalment?
Find the sum of first 16 terms of the A.P. whose nth term is given by an = 5n – 3.
