What is inverse oflaplace (s+1)/(s(s^2+2s+2)) ?

The answer to inverse oflaplace (s+1)/(s(s^2+2s+2)) is 1/2 \H(t)-e^{-t}(1/2 cos(t)-1/2 sin(t))

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

inverse oflaplace (s+1)/(s(s^2+2s+2))

inverse laplace

\frac{s + 1}{s ( s ^{2} + 2 s + 2 )}

\frac{1}{2} H (t) - e^{- t} (\frac{1}{2} cos (t) - \frac{1}{2} sin (t))

Solution steps

L^{- 1} {\frac{s + 1}{s ( s ^{2} + 2 s + 2 )}}

Take the partial fraction of

\frac{s + 1}{s ( s ^{2} + 2 s + 2 )} : \frac{1}{2 s} - \frac{s}{2 ( s ^{2} + 2 s + 2 )}

= L^{- 1} {\frac{1}{2 s} - \frac{s}{2 ( s ^{2} + 2 s + 2 )}}

Expand

\frac{s}{2 ( s ^{2} + 2 s + 2 )} : \frac{1}{2} \cdot \frac{s + 1}{( s + 1 ) ^{2} + 1} - \frac{1}{2} \cdot \frac{1}{( s + 1 ) ^{2} + 1}

= L^{- 1} {\frac{1}{2 s} - (\frac{1}{2} \cdot \frac{s + 1}{( s + 1 ) ^{2} + 1} - \frac{1}{2} \cdot \frac{1}{( s + 1 ) ^{2} + 1})}

Use the linearity property of Inverse Laplace Transform:

For functions

f (s), g (s)

and constants

a, b : L^{- 1} {a \cdot f (s) + b \cdot g (s)} = a \cdot L^{- 1} {f (s)} + b \cdot L^{- 1} {g (s)}

= L^{- 1} {\frac{1}{2 s}} - L^{- 1} {\frac{1}{2} \cdot \frac{s + 1}{( s + 1 ) ^{2} + 1} - \frac{1}{2} \cdot \frac{1}{( s + 1 ) ^{2} + 1}}

L^{- 1} {\frac{1}{2 s}} : \frac{1}{2} H (t)

L^{- 1} {\frac{1}{2} \cdot \frac{s + 1}{( s + 1 ) ^{2} + 1} - \frac{1}{2} \cdot \frac{1}{( s + 1 ) ^{2} + 1}} : e^{- t} (\frac{1}{2} cos (t) - \frac{1}{2} sin (t))

= \frac{1}{2} H (t) - e^{- t} (\frac{1}{2} cos (t) - \frac{1}{2} sin (t))

1 - t e^{- 2 t}

\int \frac{1}{4 x ^{2} + 48 x + 148} d x

\frac{\partial}{\partial x} (e^{(z + e^{x} + 1)})

\frac{\partial}{\partial x} (- 3 cos (3 x))

\int_{6}^{8} \frac{80}{( x - 6 ) ^{3}} d x

What is inverse oflaplace (s+1)/(s(s^2+2s+2)) ?
The answer to inverse oflaplace (s+1)/(s(s^2+2s+2)) is 1/2 \H(t)-e^{-t}(1/2 cos(t)-1/2 sin(t))