1.

Minimizing A with respect to Wp.d. gives

A. Wp.d. = 2λ
B. Wp.d. = λ/2
C. Wp.d. = (k)<sup>1/2</sup> x 2λ
D. Wp.d. = k x (λ)<sup>1/2</sup> x 2
Answer» D. Wp.d. = k x (‚âà√≠¬¨‚Ñ¢)<sup>1/2</sup> x 2


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