Advertisements
Advertisements
प्रश्न
If the equation `x^2-5x+1=0` has no real roots then
(a)`k<-2`
(b)`k>2`
(c) `-2<k<2`
(d) None of these
उत्तर
It is given that the equation `x^2-kx+1=0` has no real roots.
∴ `(b^2-4ac)<0`
⇒`(-k)^2-4xx1xx<0`
⇒` k^2<4`
⇒`-2<k<2`
APPEARS IN
संबंधित प्रश्न
If one root of the equation `2x^2+ax+6=0` 2 then a=?
(a)7 (b)-7 (c) 7/2 (d)-7/2
Solve `x^2-(sqrt3+1)x+sqrt3=0`
Solve `x^2+5x-(a^2+a-6)=0`
Solve `x^2+6x-(a^2+2a-8)=0`
Decide whether the following equation is quadratic equation or not.
`"y"^2 + 1/"y" = 2`
Solve the following quadratic equation.
(2x + 3)2 = 25
A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. Determine the speed of the stream and that of the boat in still water.
Write the quadratic equation 7 = 4x - x2 in the form of ax2+bx + c = 0.
A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream. Determine the speed of the stream and that of the boat in still water.
Mukund has ₹ 50 more than Sagar. If the product of the amount they have is 15,000, then find the amount each has
