Gradient of f(x,y)

find the gradient of
f(x, y) = 7(x^5)(y^4) − 9(x^3)(y^8)
Please enter your answer as a row vector, using the list syntax.

Now what i have done is below which i dont think is right for the question of row vector. Could someone help?

(35*x^4*y^4 - 27*x^2*y^8)i + (28*x^5*y^3 - 72*x^3*y^7)j

Actually its fine, i found out what to do. thanks anyway

Hello,

Quote:

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Originally Posted by taurus

find the gradient of
f(x, y) = 7(x^5)(y^4) − 9(x^3)(y^8)
Please enter your answer as a row vector, using the list syntax.

Now what i have done is below which i dont think is right for the question of row vector. Could someone help?

(35*x^4*y^4 - 27*x^2*y^8)i + (28*x^5*y^3 - 72*x^3*y^7)j

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Your result is correct, but you're asked a row vector, which will be :