$\displaystyle f(x)=7(x-4)^{\frac{3}{4}} - 3(x-4)^{\frac{7}{4}}$

Do the y-intercepts exist for this function? According to wolframalpha they do, but I don't see how that's possible.

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- Feb 23rd 2011, 05:48 PMyoungb11Y-intercepts of this function
$\displaystyle f(x)=7(x-4)^{\frac{3}{4}} - 3(x-4)^{\frac{7}{4}}$

Do the y-intercepts exist for this function? According to wolframalpha they do, but I don't see how that's possible. - Feb 23rd 2011, 05:58 PMskeeter
- Feb 23rd 2011, 05:59 PMsa-ri-ga-ma
On the y-axis x co-ordinate is zero. So find f(x).

- Feb 23rd 2011, 06:00 PMyoungb11
- Feb 23rd 2011, 06:01 PMyoungb11
- Feb 23rd 2011, 06:01 PMskeeter
- Feb 23rd 2011, 06:03 PMyoungb11
- Feb 23rd 2011, 06:09 PMQuacky
You are correct in that there are no y-intercepts. Skeeter wants you to write

**exactly**what you entered into Wolfram: somewhere, there must have been a mistake with the way you presented your formula to Wolfram or there was a misinterpretation of the formula on WA's part.

Try writing the exponents in decimal form.