If `(a)/(b)<0` and `a>0` then

If b^(2)>4ac then roots of equation ax^(4)+bx^(2)+c=0 are all real and distinct if: b 0b>0,a>0,c>0(d)b>0,a<0,c<0

If vec(a).vec(b)=0 and vec(a) xx vec(b)=0, " prove that " vec(a)= vec(0) or vec(b)=vec(0) .

If the points (a,0),(b,0),(0,c), and (0,d) are concyclic (a,b,c,d>0), then prove that ab=cd.

The orthocenter of triangle whose vertices are A(a,0,0),B(0,b,0) and C(0,0,c) is ((k)/(a),(k)/(b),(k)/(c)) then k=

If a!=b, then the system of equations ax+by+bz=0,bx+ay+bz=0,bx+by+az=0 will have a non-trivial solution if (1)a+b=0 (2) a+2b=0 (3) 2a+b=0(4)a+4b=0

If A and B are events such that P(A)= 0.4 , P(B) =0,8 " and " P(B//A) =0.6 then P(A//B)=?

If A=[(b,0,0),(0,b,0),(0,0,b)] then the value of |A||adjA| is

If (A) = 0.8, P(B) = 0.5 and P(B//A)=0.4 , then P(A//B)=0.64 .