# If y= a cos x+(b+2x)sinx then y2+y=

1.  4 cos x

2.  cos x

3.  x

4.  none

4

4 cos x

Explanation :
No Explanation available for this question

# If y= ax+b/x then x2y2+xy1-y=

1.  1

2.  0

3.  2

4.  none

4

0

Explanation :
No Explanation available for this question

# If xy=aex+be-x then xy2+2y1-xy=

1.  0

2.  y

3.  a

4.  none

4

0

Explanation :
No Explanation available for this question

# If y=a+be-4x then y2+4y1=

1.  0

2.  1

3.  2

4.  3

4

0

Explanation :
No Explanation available for this question

# If y=(x+√x2-1)m then (x2-1)y2+xy1=

1.  1

2.  m2y

3.  m2

4.  y

4

m2y

Explanation :
No Explanation available for this question

# If y=xe-1/xthen x3y2-xy1+y=

1.  1

2.  0

3.  2

4.  -1

4

0

Explanation :
No Explanation available for this question

# If y= acos (log x)+b sin (log x) then x2y2+xy1+y=

1.  0

2.  1

3.  2

4.  none

4

0

Explanation :
No Explanation available for this question

# Ify=ae-bx cos(cx+d) then y2+2by1+(b2+c2)y=

1.  1

2.  0

3.  2

4.  -1

4

0

Explanation :
No Explanation available for this question

# If y√1+x2=log(x+√1+x2) then  (1+x2)y1+xy=

1.  1

2.  0

3.  2

4.  -1

4

1

Explanation :
No Explanation available for this question

1.  n(n+1)y

2.  n

3.  n(n+1)

4.  1

4