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S = ⋃ i = 0 n − 1 F i ( S ) {\displaystyle S=\bigcup _{i=0}^{n-1}F_{i}(S)}
Vixey:
y = − ( 2 y d + d 2 + r 2 + c 2 − R 2 2 c ) 2 + r 2 {\displaystyle y={\sqrt {-\left({\frac {2yd+d^{2}+r^{2}+c^{2}-R^{2}}{2c}}\right)^{2}+r^{2}}}} FlowRate (talk) 21:40, 16 May 2008 (UTC)
Brainsurge:
∑ m | n f ( m ) {\displaystyle \sum _{m|n}f(m)}
FlowRate (talk) 21:40, 16 May 2008 (UTC)
