The value of the sum in the `50^(th)` bracket of `(1)+(2+3)+(4+5+6)+(7 + 8 + 9 +10)+....` is

Sum of n^( th) bracket of (1) + (2+ 3+4) + ( 5+ 6+ 7+ 8+9) + ….. is

Find the sum of the numbers in the nth bracket of the following sequence : (1), (2, 3), (4, 5, 6), (7, 8, 9, 10),….

Show that the sum of the numbers in the n th bracket of the series (1)+(3+5)+(7+9+11)+...+"is" n^(3) .

Find the sum in the n^(th) group of sequence,(1),(2,3);(4,5,6,7);(8,9,......15);......

There are n sets of observation given as (1),(2, 3), (4, 5, 6), (7, 8, 9, 10),….. The mean of the 13^("th") set of observation is equal to

There are n sets of observation given as (1),(2, 3), (4, 5, 6), (7, 8, 9, 10),….. The mean of the 13^("th") set of observation is equal to

Find the sum of the following series (1)+(2+3)+(4+5+6)+(7+8+9+10)+…to n terms.

If the natural numbers are divided into the groups (1),(2,3),(4,5,6),(7,8,9,10) .. then the sum of the elements of 25^(th ) group is

Find the value of ? 3 , 2 =7 5 , 4 =23 7 , 6 = 47 9 , 8 = 79 10 , 9 = ?