[" If "c>0" and "4a+c<2b" then "ax^(2)-bx+c=0" has a root in the interval "],[[" (A) "(0,2)," (B) "(2,4)," (C) "(0,1)," (D) "(-2,0)]]

if c gt 0 and 4a + c < 2 b then ax^(2) - bx + c=0 has a root in the interval

Sum of the sqaures of the distances from a point to ( c, 0 ) and ( - c , 0) is 4 c ^ 2 . Its locus is

Sum of the squares of the distances from a point to (c,0) and (-c,0) is 4c^(2) .Its locus is

Two electrons are moving in opposite directions with speeds 0.8c and 0.4c where c is the speed of lights in vacuum. Then the relative speed is about

Find the coefficient of x^(4) in the expansion of (1+x)^(n)(1-x)^(n). Deduce that C_(2) = C_(0)C_(4) - C_(1)C_(3) +C_(2)C_(2)-C_(3)C_(1)+ C_(4)C_(0)," where "C_(r) " stands for " ^(n)C_(r).

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

If the equation a x^2+b x+c=0,a ,b ,c , in R have none-real roots, then a. c(a-b+c)>0 b. c(a+b+c)>0 c. c(4a-2b+c)>0 d. none of these

The molal freezing points constant of water is 1.86 K kg "mol"^(-1) . Therefore, the freezing point of 0.1 M NaCl in water is expected to be 1) -1.86^(@)C 2) -0.372^(@)C 3) -0.186^(@)C 4) +0.372^(@)C