[Solved] Find the linear approximation to the function \(f ( x , y ) = 2 x ^ { 2 } + y ^ { 2 }\) at \(( 1,1 )\) and use it to approximate \(f ( 1.1,1.1 )\) . Skills: The ability to carry out a task with pre-determined results often within a given amount of time, energy, or both. Maintenance: The ongoing process of preserving or sustaining a desired level of efficiency or condition in a system, machine, or one's health. Cardiovascular Health: Refers to the health of the heart and blood vessels, which can be maintained or improved through lifestyle choices such as diet, exercise, and avoiding tobacco. Vigorous Running: Intense running activity that significantly raises heart rate and energy expenditure, contributing to cardiovascular fitness.