2 nd value

Find value of abs{:(1, - 1, 2),(-2, 3, 5),(-2, 0 , -1):} by expanding along 2nd row

The present value of a piece of land is ₹ 4x. If the value of the land increases at the rate of 4r% per annum, then after 2nd years the value of the land will be

If the co-factor and minor of each element of a 2nd order determinant are same, then what is the value of the element in the 2nd row and 1st column of the determinant ?

The 1^(st),2^(nd) and 3^(rd) terms of an arithme tic series are a a and a^(2) where 'a' is negative.The 1^(st),2^(nd),3^(rd) terms of a geometric series are a,a^(2) and b find the value of a and b

If in the expansion of (1+x)^(n) the coefficient of 2nd, 3rd and 4th terms are in A.P., then the value of n is-