# If a>b, maximum value of a sin2x +b cos2 x is

1.  a

2.  b

3.   a+b

4.  None

4

a

Explanation :
No Explanation available for this question

# The minimum value of √ex2-1 is

1.  0

2.  e

3.  1/e

4.  ee2

4

0

Explanation :
No Explanation available for this question

# The minimum value of px+qy when xy= r2 is

1.  2r√pq

2.  2pq√r

3.  -2r√pq

4.  None

4

2r√pq

Explanation :
No Explanation available for this question

# If f(x)=x-k/x has a maximum value at x=-2. Then k=

1.   -1

2.  -2

3.  4

4.  -4

4

-4

Explanation :
No Explanation available for this question

# If the function f(x) =x2+α/x has  a local minimum at x=2, then the value of α is

1.   8

2.  18

3.  16

4.   None

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16

Explanation :
No Explanation available for this question

# The minimum value of 2 sin x+sin 2x in [0, 2π] is

1.  -3√3/2

2.  3

3.  3√3/2

4.   2

4

-3√3/2

Explanation :
No Explanation available for this question

# The minimum value of (sin x)sinx is

1.  e-1/e

2.  1

3.  π/2

4.   1/e

4

e-1/e

Explanation :
No Explanation available for this question

# The maximum value of x2-x+1/ x2+x+1 is

1.  1

2.  3

3.  1/3

4.  None

4

3

Explanation :
No Explanation available for this question

# If x is real, the maximum value of 3x2+9x+17/3x2-9x+17 is

1.  1

2.   17/7

3.  ¼

4.  41

4

41

Explanation :
No Explanation available for this question

1.  a/d=c/d

2.  a/b=d/c

3.   a/c=b/d

4.  a/c≠b/d

4