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Popular >

derivative of x*e^{-bx^2}

Solution

\frac{d}{d x} (x \cdot e^{- b x^{2}})

Solution

e^{- b x^{2}} - 2 b e^{- b x^{2}} x^{2}

Solution steps

\frac{d}{d x} (x e^{- b x^{2}})

Apply the Product Rule:

(f \cdot g)^{'} = f^{'} \cdot g + f \cdot g^{'}

f = x, g = e^{- b x^{2}}

= \frac{d x}{d x} e^{- b x^{2}} + \frac{d}{d x} (e^{- b x^{2}}) x

\frac{d x}{d x} = 1

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

= 1 \cdot e^{- b x^{2}} + (- 2 b e^{- b x^{2}} x) x

Simplify

1 \cdot e^{- b x^{2}} + (- 2 b e^{- b x^{2}} x) x : e^{- b x^{2}} - 2 b e^{- b x^{2}} x^{2}

= e^{- b x^{2}} - 2 b e^{- b x^{2}} x^{2}

Graph

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\int_{0}^{36} \frac{1}{36 - x} d x

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y = 5 x, x = 5, y = \frac{5}{x}

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Frequently Asked Questions (FAQ)

What is the derivative of x*e^{-bx^2} ?
The derivative of x*e^{-bx^2} is e^{-bx^2}-2be^{-bx^2}x^2
What is the first derivative of x*e^{-bx^2} ?
The first derivative of x*e^{-bx^2} is e^{-bx^2}-2be^{-bx^2}x^2