1
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
If the roots of the equation $${x^2} - bx + c = 0$$ be two consecutive integers, then $${b^2} - 4c$$ equals
A
$$-2$$
B
$$3$$
C
$$2$$
D
$$1$$
2
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The value of $$a$$ for which the sum of the squares of the roots of the equation $${x^2} - \left( {a - 2} \right)x - a - 1 = 0$$ assume the least value is :
A
$$1$$
B
$$0$$
C
$$3$$
D
$$2$$
3
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
If the cube roots of unity are 1, $$\omega \,,\,{\omega ^2}$$ then the roots of the equation $${(x - 1)^3}$$ + 8 = 0, are :
A
$$ - 1, - 1 + 2\,\,\omega , - 1 - 2\,\,{\omega ^2}$$
B
$$ - 1, - 1, - 1$$
C
$$ - 1,1 - 2\omega ,1 - 2{\omega ^2}$$
D
$$ - 1,1 + 2\omega ,1 + 2{\omega ^2}$$
4
AIEEE 2005
MCQ (Single Correct Answer)
+4
-1
The value of $$\int\limits_{ - \pi }^\pi {{{{{\cos }^2}} \over {1 + {a^x}}}dx,\,\,a > 0,} $$ is
A
$$a\,\pi $$
B
$${\pi \over 2}$$
C
$${\pi \over a}$$
D
$${2\pi }$$
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