1.

verify Euler's theorem for the following functions, u=ax2+2hxy+by2

Answer»

According to Euler theorem, x du/dx + y du/dy = nu; where n is degree of the homogeneous equation.

Now, 
u = ax+ 2hxy + by2
du/dx = 2ax + 2hy
du/dy = 2hx + 2by
L.H.S = x du/dx + y du/dy
x(2ax + 2hy) + y(2hx + 2by) 
= 2ax2 + 2hxy + 2hxy + 2by2
= 2(ax+ 2hxy + by2) = 2u

Thus Euler theorem verified.



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