Isoparametric Formulation; it's elementary, really

[texas_better]

Homework Statement

Use the isoparametric formulation to express the following deflection information: U1=0.01cm, U2=0.025 cm with the corresponding global coordinates X1=5cm, X2=12cm
Show the transformation equations between the global coordinate, the local coordinate, and the natural coordinate

Homework Equations

I really wish I knew.

The Attempt at a Solution

I've been confused, oblivious, and completely ignorant enough times that it could be a certifiable miracle I'm a graduate student today, but I cannot recall a time I've been this derailed. I don't even know what this question is asking. If someone could even just be like, "hey do this to get started," I'd be in your debt. I have two textbooks supposedly on this information and neither of them identify what I'm looking at here.

 

[DEvens]

http://en.wikipedia.org/wiki/Isoparametric_function