Eliminating a and b from the (x - a)2 + (y - b)2 + z2 = c2 the partial differential equation is

Eliminating a and b from the (x - a)2 + (y - b)2 + z2 = c2 the partia

1.	Eliminating a and b from the (x - a)2 + (y - b)2 + z2 = c2 the partial differential equation is
A.	z2(p - q + 1) = c2
B.	z2(p2 + q2 + 1) = c2
C.	z2(p2 + q2) = c2
D.	z2(p - q) = c2
Answer» C. z2(p2 + q2) = c2

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