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Mathematics, 28.09.2019 23:30 airiyannag0113
For f(x, y), find all values of x and y such that fx(x, y) = 0 and fy (x, y) = 0
simultaneously. f(x, y) = 15x^3-3xy+15y^3.
my calculations:
fx(x, y)=
![45x ^{2} - 3y = 0](/tex.php?f=45x ^{2} - 3y = 0)
fy(x, y)=
![- 3x + 45y ^{2} = 0](/tex.php?f= - 3x + 45y ^{2} = 0)
i got stuck there
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For f(x, y), find all values of x and y such that fx(x, y) = 0 and fy (x, y) = 0
simultaneously...
simultaneously...
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