Solve 8x^2y=-2 - ScanMath

Solve the equation

y = - \frac{1}{4 x ^{2}}

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Testing for symmetry about the origin

Testing for symmetry about the x-axis

Testing for symmetry about the y-axis

Not symmetry with respect to the origin

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r = - \frac{1}{3 sin ( 3 θ ) + sin ( θ )}

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Find the derivative with respect to x

Find the derivative with respect to y

\frac{d y}{d x} = - \frac{2 y}{x}

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Find the second derivative with respect to x

Find the second derivative with respect to y

\frac{d ^{2} y}{d x ^{2}} = \frac{6 y}{x ^{2}}

Calculate

8 x^{2} y = - 2

Take the derivative of both sides

\frac{d}{d x} (8 x^{2} y) = \frac{d}{d x} (- 2)

Calculate the derivative

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16 x y + 8 x^{2} \frac{d y}{d x} = \frac{d}{d x} (- 2)

Calculate the derivative

16 x y + 8 x^{2} \frac{d y}{d x} = 0

Move the expression to the right-hand side and change its sign

8 x^{2} \frac{d y}{d x} = 0 - 16 x y

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

8 x^{2} \frac{d y}{d x} = - 16 x y

Divide both sides

\frac{8 x ^{2} \frac{d y}{d x}}{8 x ^{2}} = \frac{- 16 x y}{8 x ^{2}}

Divide the numbers

\frac{d y}{d x} = \frac{- 16 x y}{8 x ^{2}}

Divide the numbers

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\frac{d y}{d x} = - \frac{2 y}{x}

Take the derivative of both sides

\frac{d}{d x} (\frac{d y}{d x}) = \frac{d}{d x} (- \frac{2 y}{x})

Calculate the derivative

\frac{d ^{2} y}{d x ^{2}} = \frac{d}{d x} (- \frac{2 y}{x})

Use differentiation rules

\frac{d ^{2} y}{d x ^{2}} = - \frac{\frac{d}{d x} ( 2 y ) \times x - 2 y \times \frac{d}{d x} ( x )}{x ^{2}}

Calculate the derivative

More Steps

\frac{d ^{2} y}{d x ^{2}} = - \frac{2 \frac{d y}{d x} \times x - 2 y \times \frac{d}{d x} ( x )}{x ^{2}}

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

\frac{d ^{2} y}{d x ^{2}} = - \frac{2 \frac{d y}{d x} \times x - 2 y \times 1}{x ^{2}}

Use the commutative property to reorder the terms

\frac{d ^{2} y}{d x ^{2}} = - \frac{2 x \frac{d y}{d x} - 2 y \times 1}{x ^{2}}

Any expression multiplied by 1 remains the same

\frac{d ^{2} y}{d x ^{2}} = - \frac{2 x \frac{d y}{d x} - 2 y}{x ^{2}}

Use equation \frac{d y}{d x} = - \frac{2 y}{x} to substitute

\frac{d ^{2} y}{d x ^{2}} = - \frac{2 x ( - \frac{2 y}{x} ) - 2 y}{x ^{2}}

Solution

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\frac{d ^{2} y}{d x ^{2}} = \frac{6 y}{x ^{2}}

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