The sum of 41 terms of an A.P. with middle term 40 is : 1. 820 2. 1640 3. 2460 4. none of these

No. of terms = 41 Middle term = = 21st term Given, Middle term = 40 ⇒ a 21 = 40 ⇒ a + (21 - 1)d = 40 ⇒ a + 20d = 40 ............(1) By formula, Sum of A.P. = [2a + (n - 1)d] = = = = 41 × 40 ..........[From (1)] = 1640. Hence, Option 2 is the correct option.

In an A.P. if m^th term is n and n^th term is m, show that its r^th term is (m + n - r).

View Answer Bookmark Now

Which term of the A.P. 3, 10, 17, …….. will be 84 more than its 13^th term ?

View Answer Bookmark Now

The sum of all two digit numbers is :
9810
9045
4509
4905

View Answer Bookmark Now

The sum of A.P. 4, 7, 10, 13, …….. upto 20 terms is :
650
10 × 27
510
1300

View Answer Bookmark Now

Mathematics

The sum of 41 terms of an A.P. with middle term 40 is :
820
1640
2460
none of these

AP GP

Related Questions

In an A.P. if m^th term is n and n^th term is m, show that its r^th term is (m + n - r).

Which term of the A.P. 3, 10, 17, …….. will be 84 more than its 13^th term ?

The sum of all two digit numbers is :
9810
9045
4509
4905

The sum of A.P. 4, 7, 10, 13, …….. upto 20 terms is :
650
10 × 27
510
1300

Mathematics

The sum of 41 terms of an A.P. with middle term 40 is :82016402460none of these

AP GP

Related Questions

In an A.P. if mth term is n and nth term is m, show that its rth term is (m + n - r).

Which term of the A.P. 3, 10, 17, …….. will be 84 more than its 13th term ?

The sum of all two digit numbers is :9810904545094905

The sum of A.P. 4, 7, 10, 13, …….. upto 20 terms is :65010 × 275101300

The sum of 41 terms of an A.P. with middle term 40 is :
820
1640
2460
none of these

In an A.P. if m^th term is n and n^th term is m, show that its r^th term is (m + n - r).

Which term of the A.P. 3, 10, 17, …….. will be 84 more than its 13^th term ?

The sum of all two digit numbers is :
9810
9045
4509
4905

The sum of A.P. 4, 7, 10, 13, …….. upto 20 terms is :
650
10 × 27
510
1300