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Math Help - Easy Question

  1. #1
    Member Mr Rayon's Avatar
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    Smile Easy Question

    Okay, my class has just started derivatives and I am stuck on a question.

    For the following, find \frac{dy}{dx}:
     <br />
y=\frac{10x^7 + 2x^2}{x^2}, x\neq 0<br />

    Any help will be appreciated. Please show complete working out.
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  2. #2
    Master Of Puppets
    pickslides's Avatar
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    Hi Mr Rayon

    check this out

     <br />
y=\frac{10x^7 + 2x^2}{x^2}=\frac{10x^7 }{x^2}+\frac{ 2x^2}{x^2}= 10x^5 + 2 <br />


    so we can say

     <br />
y=10x^5 + 2 <br />


    Can you find \frac{dy}{dx} from here?
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  3. #3
    Member Mr Rayon's Avatar
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    Quote Originally Posted by pickslides View Post
    Hi Mr Rayon

    check this out

     <br />
y=\frac{10x^7 + 2x^2}{x^2}=\frac{10x^7 }{x^2}+\frac{ 2x^2}{x^2}= 10x^5 + 2 <br />


    so we can say

     <br />
y=10x^5 + 2 <br />


    Can you find \frac{dy}{dx} from here?
    dang i'm an idiot.
    I thought the denominator was x^7. but if it had been x^7 i think i know what i should have done.

    cheers
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