The first two terms of a geometric progression add up to 12. The sum of the third and the fourth&
On addition of AgNO3 to four different test tubes containing different solut
A cubic f (x) has a real root α and two complex roots β + i and β - i . If points
If aij = 0(i≠j) and aij=2(i=j) then the matrix A=[aij]
