# If a,b,c,d are any four consecutive coefficients in the expansion of (1+x)n,then a/a+b,b/b+c,c/c+d are in

1.  A.P

2.  G.P

3.  H.P

4.  A.G.P

4

A.P

Explanation :
No Explanation available for this question

# If a,b,c are positive then both roots of equation ax2+bx+c=0

1.  Are real and negative

2.  Are real and positive

3.  Have negative real parts

4.  Have positive real parts

4

Have negative real parts

Explanation :
No Explanation available for this question

# If C0+C1+C2+…+Cn=128 then C0-C1/2+C2/3-C3/4+…..=

1.  0

2.  8

3.  1/8

4.  7/8

4

1/8

Explanation :
No Explanation available for this question

# If b2-4ac>0,then the graph of y= ax2+bx+c

1.  Cuts x-axis in two real points

2.  Real and Equal

3.  Lies entirely above the x-axis

4.  Cannot be determined

4

Cuts x-axis in two real points

Explanation :
No Explanation available for this question

# The value of (101)10 correctto 3 decimal places is

1.  1.105

2.  1.205

3.  1.104

4.  1.204

4

1.105

Explanation :
No Explanation available for this question

# If the quadratic equation ax2+bx+c=0 if a and c are of opposite signs and b is real,then roots of the equation are

1.  Real and distinct

2.  Real and equal

3.  imaginary

4.  Both roots positive

4

Real and distinct

Explanation :
No Explanation available for this question

# Ifa>0 and b2-4ac=0 then the graph of y= ax2+bx+c

1.  Lies entirely above the x-axis

2.  Touches the x-axis and lies above it

3.  Touches the x-axis and lies below it

4.  cuts the x-axis

4

Touches the x-axis and lies above it

Explanation :
No Explanation available for this question

# The coefficient of x2y3z4 in the expansion of (ax-by+cz)9 is

1.  1260a2b3c4

2.  -1260a2b3c4

3.  -1220a2b3c4

4.  1220a2b3c4

4

-1260a2b3c4

Explanation :
No Explanation available for this question

# C1+2.C2+3.C3+….+nCn=

1.  n.2n

2.  n.2 n-1

3.  (n+1)2 n

4.  (n+1)2 n-1

4

n.2 n-1

Explanation :
No Explanation available for this question

1.  b2-4ac>0

2.  b2-4ac

3.  b2-4ac=0

4.  b2-ac

4