If be the roots of the quadratic equation x2 + x + 1 = 0, then the equation whose roots are f is
x2 - x + 1 = 0
x2 - x - 1 = 0
x2 + x - 1 = 0
x2 + x + 1 = 0
The roots of the quadratic equation are
imaginary
real, rational and equal
real, irrational and unequal
real, rational and unequal
The quadratic equation x2 + 15 + 14 = 0 has
only positive solutions
only negative solutions
no solution
both positive and negative solution
If
π
- π
π/2
- π/2
A.
π
Two dice are tossed once. The probability of getting an even number at the first die or a total of 8 is
The probability that at least one of A and B occurs is 0.6. If A and B occur simultaneously with probability 0.3, then P(A') + P(B') is
0.9
0.15
1.1
1.2
In a right-angled triangle, the sides are a, b and c with c as hypotenuse and c - b 1, c + b 1. Then the value of (logc + b(a) + logc - b(a))/ (2logc + b(a) x logc - b(a)) will be
2
- 1
1
Sum of n terms of the following series 13 + 33 + 53 + 73 + ... is
n2(2n2 - 1)
n3(n - 1)
n3 + 8n + 4
2n4 + 3n2