# Pdx+x sin y dy=0 is exact,then P can be

1.  Sin y+cos y

2.  -sin y

3.  X2-cos y

4.  Cos y

4

Sin y+cos y

Explanation :
No Explanation available for this question

# If f(x)=tan-1x and f(0)=0,then f(i) is

1.  π/4+log2

2.  π/2-log2

3.  1/4(π-log4)

4.  1/4(π+log4)

4

1/4(π-log4)

Explanation :
No Explanation available for this question

# The rate of which bacteria multiply is proportional to the instantaneous number present,if the original number doubles in 2 hours,then it will triple in

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# If f(D)y=0 be a linear Differential equation with constant coefficients,then its auxiliary equation is

1.  f(m3)=0

2.  f(m)=0

3.  f(D-m)=0

4.  f(x)=0

4

f(m)=0

Explanation :
No Explanation available for this question

# The general soluation of the linear differential equation (D4-81)y=0 is given by

1.  (C1+C2x)e3x+(C3+C4 x)sin 3x

2.  (C1+C2x)e3x+(C3+C4x)e-3x+(C5+C6x)cos 3x+(C7+C8x)sin 3x

3.  C1e3x+C2e-3x+C3cos 3x+C4sin 3x

4.  C1e3x+C2e-3x+e3x(C3cos x+C4sin x)

4

C1e3x+C2e-3x+C3cos 3x+C4sin 3x

Explanation :
No Explanation available for this question

# is equal to

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# P.I of (D2-2D)y=exsin x is

1.  -1/2 exsin x

2.  excos x

3.  -1/2excos x

4.  None of these

4

-1/2 exsin x

Explanation :
No Explanation available for this question

# General soluation of the differential equation (D2-m2)y=0 is

1.  Y=(C1+C2x)emx

2.  Y=C1sin x+C2cos x

3.  Y=C1cos hx+C2sin hx

4.  None of these

4

Y=C1cos hx+C2sin hx

Explanation :
No Explanation available for this question

# is equal to

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4