Let , where .…

MATHEMATICS · Multi correct · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation

Problem

Let

f(x,y)=x^2+2xy+3y^2-6x-2y

, where

x,y\in\mathbb{R}

. Then (1)

f(x,y)\geq -11

(2)

f(x,y)\geq -10

(3)

f(x,y)>-11

(4)

f(x,y)>-12