# x2+x+1/(x-1)(x-2)(x-3)      =  A/(x-1) + B/(x-2) + C/(x-3) =====> A+C =

1.  4

2.  5

3.  6

4.  8

4

8

Explanation :
No Explanation available for this question

1.  1/e

2.  e/2

3.  e

4.  2e

4

1/e

Explanation :
No Explanation available for this question

# If a > 0 and b2 – 4ac = 0, then the curve y = ax2 + bx + c

1.  cuts the x-axis

2.  touches the x-axis and lies below it lies entirely above the x-axis

3.  lies entirely above the axis

4.  touches the x-axis and lies above it

4

touches the x-axis and lies above it

Explanation :
No Explanation available for this question

# If tan A and tan B are the roots of the quadratic equation x2-px+q = 0 then sin2 (A+B) =

1.  p2 /(p2+q2)

2.  p2 /(p+q)2

3.  1- p /(1-q2)

4.  p2 /p2+(1-q)2

4

p<sup>2</sup> /p<sup>2</sup>+(1-q)<sup>2</sup>

Explanation :
No Explanation available for this question

# The value of ‘a’ for which the equations x3 + ax + 1 = 0 and x4 + ax2 +1=0 have a common root is

1.  -2

2.  -1

3.  1

4.  2

4

-2

Explanation :
No Explanation available for this question

# If x is real , then the value of  x2-3x+4 /  x2+3x+4 lies in the interval

1.  [1/3 , 3]

2.  [1/5 , 5]

3.  [1/6 , 6]

4.  [1/7 , 7]

4

[1/7 , 7]

Explanation :
No Explanation available for this question

1.  A(-α, β)

2.  A(-α, -β)

3.  A(α, -β)

4.  A(α, β)

4

A(-α, -β)

Explanation :
No Explanation available for this question

# If A is a matrix such that

1.

2.  (2, 1)

3.

4.

4

Explanation :
No Explanation available for this question

1.  A-1

2.  –A-1

3.  I

4.  -I

4

–A-1

Explanation :
No Explanation available for this question

1.  0

2.  -1

3.  1

4.  2

4