# The function f(x) = xe-x (x ∈R) attains a maximum value at x = …….

1.  2

2.  1/e

3.  1

4.  3

4

1

Explanation :
No Explanation available for this question

# If z = sec(y – ax) + tan(y + ax), then (∂2z/∂x2) – a2(∂2z/∂y2) =

1.  z

2.  2z

3.  0

4.  -z

4

0

Explanation :
No Explanation available for this question

# is equal to :

1.  -1

2.  1

3.  -1/2

4.  1/2

4

1/2

Explanation :
No Explanation available for this question

# If y = f(x) = (2x-1)/(x-2),then f(y) is equal to

1.  x

2.  y

3.  2y-1

4.  y-2

4

x

Explanation :
No Explanation available for this question

1.  log 2/3

2.  log 4/3

3.  log 8/3

4.  log 1/4

4

log 4/3

Explanation :
No Explanation available for this question

1.  3π/128

2.  3π/ 256

3.  3π/ 572

4.  3π/ 64

4

3π/ 256

Explanation :
No Explanation available for this question

# The approximate value ofby using trapezoidal rule with 4 equal, intervals is :

1.  248

2.  242.5

3.  242.8

4.  243

4

248

Explanation :
No Explanation available for this question

# Let A = {x ∈R : x ≠ 0, -4 ≤ x ≤ 4} f : A → IR is defined by f(x) = |x|/x for x∈A,Then the range of f is

1.  {1,-1}

2.  {x : 0 ≤ x ≤ 4}

3.  {1}

4.  {x : -4 ≤ x ≤ 0}

4

{1,-1}

Explanation :
No Explanation available for this question

# If the coefficient of x in the expansion of (x2+(k/x))5 is 270, then k =

1.  1

2.  2

3.  3

4.  4

4

3

Explanation :
No Explanation available for this question

1.  1

2.  2

3.  3

4.  4

4