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March 6, 2015

March 6, 2015

Posted by **enigma** on Wednesday, September 26, 2012 at 10:52am.

f (x,y) = 4x^3 + 7xy^4 - 5y^2 + 8

Determine, fxx + fyx at x = 4.25 and y = 3.69,

giving your answer to 3 decimal places.

- math -
**Steve**, Wednesday, September 26, 2012 at 11:46amfx = 12x^2 + 7y^4

fy = 28xy^3 - 10y

fxx = 24x

fyx = 28y^3

plug in the numbers

- math -
**enigma**, Friday, September 28, 2012 at 3:56pmthanks for helping me. i was stuck trying to solve this.

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