Evaluate the partial derivatives of shape functions at (zeta=1 / 4) and (eta=1 / 2) of a

Question:

Evaluate the partial derivatives of shape functions at \(\zeta=1 / 4\) and \(\eta=1 / 2\) of a quadrilateral element shown in Figure 3.32, assuming the temperature is approximated by

(a) bilinear,

(b) quadratic interpolating polynomials.

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