NNN Find the value of in the terms of the first row and the first column.

IF the coafactor and minor of each element of a second order determinant are same, then what is the value of the element is the second row and first column of determinant.

Consider the matrix A = [(a,b,c),(d,e,f),(g,h,i)] . Write the submatrix of A obtained by deleting first row and the first column.

The sum of the first 8 terms of an A.P. is 100 and the sum of its first 19 terms is 551. Find the first term and the common difference of the AP.

Find the sum of first 20 terms of the arithmetic progression having the sum of first 10 terms as 52 and the sum of the first 15 terms as 77.

. What is the sum of all terms in the first 30 rows ?

The first term of an arithmetic sequence is 1 and the sum of the first four terms is 100 . Find the first four terms:

The sum of first 7 terms of an A.P. is 49 and that of first 17 terms of it is 289. Find the sum of first n terms.

The sum of the first five terms of an AP and the sum of the first seven terms of theits first twenty terms.same AP is 167. If the sum of the first ten terms of this AP is 235, find the sum of first twenty terms

Find the value of the common ratio if (i) the finst term is 11, sum of the first 12 terms is 2922920 (ii) the first term is 1, sum of the first 6 terms is 1.24992

The first term of an arithmetic progression is 1 and the sum of the first nine terms equal to 369 . The first and the ninth term of a geometric progression coincide with the first and the ninth term of the arithmetic progression. Find the seventh term of the geometric progression.