# The angles A,B and C are in A.P. in a ABC. If AB=6,BC=7 then AC=

1.  5

2.  7

3.  8

4.  none

4

none

Explanation :
No Explanation available for this question

# f (x) = 1, if x is  rational =0, if  x  is  irrational. Then f(1/2)+f(√5)/fof(√3)=

1.  0

2.  1

3.  2

4.  1/2

4

1

Explanation :
No Explanation available for this question

# In a ABC, AB=6, BC=5 and CA=4 and AP bisects the angle A. If P lies on BC then BP=

1.  3

2.  31/10

3.  29/10

4.  9/2

4

3

Explanation :
No Explanation available for this question

# If f (x)=|x|, then f[f(x)]=

1.  f(x)

2.  –f(x)

3.  –x

4.  none

4

f(x)

Explanation :
No Explanation available for this question

# If the orthocentre and circumcentre of a triangle  are (2,-3), (5,6) then the centroid is

1.  (2,7)

2.  (-3,-4/3)

3.  (4,3)

4.  (-1,-3)

4

(4,3)

Explanation :
No Explanation available for this question

# If f(x)=√x3-1 and g(x)=3√x2+1, then (fog)(x)=

1.   x

2.  x2

3.  x3

4.  none

4

x

Explanation :
No Explanation available for this question

1.  1

2.  ∞

3.  1/2

4.

4

1

Explanation :
No Explanation available for this question

# If f: R→R,, g: R→R, are defined by f(x)=x2+2x-3, g(x)=3x-4, then (f o g)(-1)=

1.  165

2.  32

3.  16

4.  -16

4

32

Explanation :
No Explanation available for this question

1.  1

2.  2

3.  3

4.  4

4

4

Explanation :
No Explanation available for this question

1.  (3,2)

2.  (1,0)

3.  (4,3)

4.  (3,4)

4