Formula for sum of n terms of an AP
Trending Questions
Find the term from the last term of the AP:
The houses of a row are numbered consecutively from . Show that there is a value of such that the sum of the numbers of the houses preceding the house numbered is equal to the sum of the numbers of the houses following it. Find this value of. [Hint ]
The sum of all two digit odd numbers is:
2530
4950
2475
4905
- -4, -1, 2
- 3, 2, 1
- 8, 12, 16
- 5, 6, 7
Find the sum of 20 terms of the A.P. 1, 4, 7, 10, ......
590
600
570
580
What is the sum of first natural numbers?
Find the sum of 10 terms of the sequence 1, 3, 5, 7, …
100
98
102
104
In a theater, there are seats in the first row. Each row has more seats than the row ahead of it. There are rows in the theater. Find the total number of seats in the theater.
In a GP, the term Is and the term Is then find the term.
In the given APs, find the missing terms.
If the sum of p terms of an AP is qand the sum of q term is p, then the sum of p + qterms will be:
- 0
- p - q
- p + q
- -(p + q)
If a set and a set then
If the sum of the first 14 terms of an AP is 1050 and its first term is 10, find the 20th term.
A man arranges too pay off a debt of by annual instalments which form an arithmetic series.
When of the instalments are paid, he dies leaving one-third of the debt unpaid, find the value of the first instalment.
- 92
- 96
- 104
- 100
How many terms of the AP: 9, 17, 25, ... must be added to get a sum of 636?
In an AP which has n terms, if we know the first and the last term, then we can find the sum of all the terms.
True
False
If pth term of an AP is a and its qth term is b, then what is the sum of the first (p+q) terms of the AP?
Find the sum : 34 + 32 + 30 + .... + 10
300
286
310
240
Find the sum of all odd numbers between 0 and 50.
650
625
675
700
A spiral is made up of successive semicircles, with centers alternatively at A and B, starting with center at A, of radii 0.5 cm, 1.0 cm, 1.5 cm, 2.0 cm, ... What is the total length of such a spiral made up of thirteen consecutive semicircles?
The sum of four consecutive numbers in an A.P. with common difference d>0 is 20. If the sum of their squares is 120, then the middle terms are __ and __.
6, 8
8, 10
2, 4
4, 6
- -64
- -60
- -66
- -62