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Use the rules of differentiation to find the derivative of the function.` `...

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davidsang8 | Student, Undergraduate | eNoter

Posted February 14, 2013 at 8:24 PM via web

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Use the rules of differentiation to find the derivative of the function.` `

1.`f(x)=2x^3-4x^2+3x`

 

2.`y=3/4e^(x)+2cosx`

3.`g(x)=root(6)(x)`

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Mary Joy Ripalda | High School Teacher | (Level 3) Educator

Posted February 15, 2013 at 2:33 AM (Answer #1)

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`f(x)=2x^3-4x^2+3x`

To take the derivative, apply the rule for sum and difference of functions which is `(u+-v)'=u'+-v'` .

So, take the derivative of each term.

`f'(x)=(2x^3)' - (4x^2)' + (3x)'`

For each term, apply the power rule of derivatives which is `(cx^n)'=c*nx^(n-1)` .

`f'(x)= 2*3x^(3-1) - 4*2x^(2-1) + 3x^(1-1)`

`f'(x)=6x^2 - 8x+3`

Hence, the derivative of `f(x)==2x^3-4x^2+3x` is `f'(x)=6x^2 - 8x+3` .

(Note: For #2 and #3, post them as separate questions.)

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