1.  2

2.  1

3.  -1

4.  1/2

4

1/2

Explanation :
No Explanation available for this question

# A={1, 2, 3, 4, 5}, B={1, 4, 7, 10, 13}. If f from A into B defined by f(x)=3x-2, then f is

1.   function

2.  one one

3.  onto

4.  one one onto

4

one one onto

Explanation :
No Explanation available for this question

# The orthocentre of the triangle formed by(2,-1/2), (1/2,-1/2)and (2,√3-1/2) is

1.  (3/2,(9√3-3)/6)

2.  (2,-1/2)

3.  (5/4,(√3-2)/4)

4.  (1/2,-1/2)

4

(2,-1/2)

Explanation :
No Explanation available for this question

# A={-1, 0, 2, 5, 6, 11}, B= {2, -1, 1, 0, 11, 108} and f(x)=x2-x-2, then f from A into B is

1.  function

2.  one one

3.  onto

4.  one one onto

4

one one onto

Explanation :
No Explanation available for this question

# Origin is the orthocentre of ABC  where A=(5,-1), B=(-2,3) then the orthocentre of ?OAC is

1.  (-4,-7)

2.  (3,-2)

3.  (-2,3)

4.  (5,-1)

4

(-2,3)

Explanation :
No Explanation available for this question

# If cosA=, then ΔABC is

1.  isosceles

2.  equilateral

3.  right angled

4.  none

4

isosceles

Explanation :
No Explanation available for this question

# A={-1, 0, 1, 2}, B= {2, 3, 6,}If f from A into B defined by f(x)=x2+2, then f  is

1.  function

2.  one one

3.  onto

4.  one one onto

4

onto

Explanation :
No Explanation available for this question

# If A={1,2, 3}, B= {a, b, c, d}, f={(1,a), (2, b), (3, d)}, then f is

1.  mapping

2.  one one

3.  onto

4.  one-one-onto

4

one one

Explanation :
No Explanation available for this question

# If O is the orthocentre of the triangle formed by A(1,-3). B=(7,2), C=(2,5) then the distance between the orthocentres of BOC, ?AOB is

1.  √65

2.  2√65

3.  1/2√65

4.   none

4

√65

Explanation :
No Explanation available for this question

# If A={a, b, c}, B={x, y}, f={(a, x), (b, y), (c, x)} then f is….mapping

1.  onto

2.  one one

3.  one one onto

4.   none

4

onto

Explanation :
No Explanation available for this question

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