What is the derivative of 20x(1-x^3) ?

The derivative of 20x(1-x^3) is 20((1-x)^3-3x(1-x)^2)

What is the first derivative of 20x(1-x^3) ?

The first derivative of 20x(1-x^3) is 20((1-x)^3-3x(1-x)^2)

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\frac{d}{d x} (20 x (1 - x)^{3})

20 ((1 - x)^{3} - 3 x (1 - x)^{2})

Solution steps

\frac{d}{d x} (20 x (1 - x)^{3})

Take the constant out:

(a \cdot f)^{'} = a \cdot f^{'}

= 20 \frac{d}{d x} (x (1 - x)^{3})

Apply the Product Rule:

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

f = x, g = (1 - x)^{3}

= 20 (\frac{d x}{d x} (1 - x)^{3} + \frac{d}{d x} ((1 - x)^{3}) x)

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

\frac{d}{d x} ((1 - x)^{3}) = - 3 (1 - x)^{2}

= 20 (1 \cdot (1 - x)^{3} + (- 3 (1 - x)^{2}) x)

Simplify

= 20 ((1 - x)^{3} - 3 x (1 - x)^{2})

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What is the derivative of 20x(1-x^3) ?
The derivative of 20x(1-x^3) is 20((1-x)^3-3x(1-x)^2)
What is the first derivative of 20x(1-x^3) ?
The first derivative of 20x(1-x^3) is 20((1-x)^3-3x(1-x)^2)