Given a surface f(x,y) = -3x2 + (4)y2. Find the derivative in the direction of v = <3, -6> at the point (1, 7). Give your answer correct to two decimal places.

Q: 21 4 B=5 -2 A= %3D 3 0 Find the Lollowing 5 Only) (chease A+B 3A -B

A: A=2-130  , B=521-21) A+B    =2-130+521-2  =2+5-1+23+10-2  =714-2A+B=[714-2]

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