Maxima and MinimaHard

Question

If then the difference between the maximum and minimum values of u2 is given by

Options

A.2(a2 + b2)
B.
C.(a + b)2
D.(a - b)2

Solution



⇒ u2 = a2 + b2 + 2
min value of u2 = a2 + b2 + 2ab
max value of u2 = 2(a2 - b2)
⇒ u2max - u2min = (a - b)2.

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