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find  `y'`  when  `y=(t^2+8t)/(3t)`  without using the quotient rule.

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user7230927 | Honors

Posted July 1, 2013 at 10:02 PM via web

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find  `y'`  when  `y=(t^2+8t)/(3t)`  without using the quotient rule.

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lfryerda | High School Teacher | (Level 2) Educator

Posted July 1, 2013 at 10:50 PM (Answer #1)

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To find the derivative of this function, we first want to simplify it, then we can take the derivative.

Notice that when `t ne 0` , 

`y={t^2+8t}/{3t}`   divide numerator and denominator by `t`

`=1/3(t+8)`

now we can take the derivative.  In this case, we just have a power rule for the first term, and the second term is a constant, so its derivative is zero.

`y' = 1/3`

Without using the quotient rule, the derivative is `y'=1/3` .

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