Solve r = l/w - ScanMath

Simplify

r = \frac{l}{w}

Find the first partial derivative by treating the variable w as a constant and differentiating with respect to l

\frac{\partial r}{\partial l} = \frac{\partial}{\partial l} (\frac{l}{w})

Use differentiation rule \frac{\partial}{\partial x} (\frac{f ( x )}{g ( x )}) = \frac{\frac{\partial}{\partial x} ( f ( x )) \times g ( x ) - f ( x ) \times \frac{\partial}{\partial x} ( g ( x ) )}{( g ( x ) ) ^{2}}

\frac{\partial r}{\partial l} = \frac{\frac{\partial}{\partial l} ( l ) w - l \times \frac{\partial}{\partial l} ( w )}{w ^{2}}

Use \frac{\partial}{\partial x} x^{n} = n x^{n - 1} to find derivative

\frac{\partial r}{\partial l} = \frac{1 \times w - l \times \frac{\partial}{\partial l} ( w )}{w ^{2}}

Use \frac{\partial}{\partial x} (c) = 0 to find derivative

\frac{\partial r}{\partial l} = \frac{1 \times w - l \times 0}{w ^{2}}

Any expression multiplied by 1 remains the same

\frac{\partial r}{\partial l} = \frac{w - l \times 0}{w ^{2}}

Any expression multiplied by 0 equals 0

\frac{\partial r}{\partial l} = \frac{w - 0}{w ^{2}}

Removing 0 doesn't change the value,so remove it from the expression

\frac{\partial r}{\partial l} = \frac{w}{w ^{2}}

Solution

More Steps

\frac{\partial r}{\partial l} = \frac{1}{w}

Function