If f(x)=a/x+bx has minimum at (2, 1) then (a, b)=

1.  (1, 1/4)

2.  (1/4, 1)

3.  (1, 4)

4.  (2, 1)

4

(1, 1/4)

Explanation :
No Explanation available for this question

If y= ax+b/(x-1)(x-4) has a maximum value at the point (2, -1) then

1.  A=10, b=20

2.  a=1, b=0

3.   a=5, b=5

4.  None

4

a=1, b=0

Explanation :
No Explanation available for this question

If a quadratic function in x has the value 9 when x=1 and has maximum value 10 when x=2 then the function is

1.   –x2+4x+6

2.   x+4x-x2

3.  8+4x-x2

4.  None

4

–x2+4x+6

Explanation :
No Explanation available for this question

If a cubic function of x has maximum 10 and minimum -5/2, when x=-3 and x=2 then the function is

1.  1/5x3+3/10x2-18/5x+19/10

2.   1/5x3+3/10x2-18/5x+16/100

3.  ax2+bx+c=0

4.  None

4

1/5x3+3/10x2-18/5x+19/10

Explanation :
No Explanation available for this question

The real number x when added to its inverse gives the minimum value of their sum at x=

1.  2

2.   1

3.  -1

4.  -2

4

1

Explanation :
No Explanation available for this question

If the product of two positive numbers is 400 then the minimum value of their sum is

1.  8

2.  12

3.  32

4.  40

4

40

Explanation :
No Explanation available for this question

The sum of two positive numbers is 12. The numbers so that the sum of the squares is minimum are

1.   6, 6

2.  15, 38

3.  24, 24

4.   38, 50

4

6, 6

Explanation :
No Explanation available for this question

The difference of two positive numbers is 10. If the square of the greater exceeds twice the square of the smaller by maximum value then they are

1.  15, 5

2.  20, 10

3.  30, 20

4.  None

4

20, 10

Explanation :
No Explanation available for this question

The sum of three numbers is 30. The first plus three times the second plus four times the third add on to 80. The numbers so that the product of all three is as large as possible are

1.  12, 10, 10

2.  10, 10, 10

3.  12, 12, 12

4.  10, 12, 12

4

10, 10, 10

Explanation :
No Explanation available for this question

1.  32, 30

2.  32, 32

3.  40, 42

4.  42, 42

4