Quant Question Of The Day: 264
For how many of the following values of k can F( x ) = ( k + 10) x2 + ( k + 10) x – 9 = 0 have equal roots?
(i) −46 (ii) −25 (iii) −10 (iv) −3 (v) 10
A. 1
B. 2
C. 3
D. 0
For how many of the following values of k can F( x ) = ( k + 10) x2 + ( k + 10) x – 9 = 0 have equal roots?
(i) −46 (ii) −25 (iii) −10 (iv) −3 (v) 10
A. 1
B. 2
C. 3
D. 0
b2– 4ac must have equal to zero.
i.e , (k + 10)2 = 4(k + 10)(-9)
k = -46 or -10
Howver if k = -10, then f(x) = 0 becomes -9 = 0, which is not possible. Therefore, k can be only – 46.
New Question: Unit Digits and Last Two Digits
In a test match in cricket, the scores of Rohit and Vir...
By nhuadovan , 3 months ago
New Question: Unit Digits and Last Two Digits
The 111th digit of the series 149162536496481........ i...
By nhuadovan , 3 months ago
New Question: Unit Digits and Last Two Digits
how many perfect squares of natural numbers between 300...
By nhuadovan , 3 months ago
New Question: Permutation and combination
Find the number of ways to distribute 2n different ball...
By nhuadovan , 3 months ago
A cube is divided into two parts by a plane passing thr...
By nhuadovan , 3 months ago
RE: List of Authors to be read
Thank you for sharing the list ... i will try to read o...
By Peter Virdee , 10 months ago
New Question: Permutation and combination
The collection of the questions are really great it wil...
By Peter Virdee , 11 months ago
Mark bought 45 grinders for Rs. 2215, while carrying h...
By Alexander Zingman , 12 months ago
New Question: Unit Digits and Last Two Digits
Great thread ,i tried to do these but not able to do..t...
By Alexander Zingman , 12 months ago
2. -46 and -10
B
2
C -10
1 value of k = -46
2
B