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Y=8X-9

F^-1 =
Guest Mar 21, 2012
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F(X) = 8*X-9

Y=8X-9
Y+9=8X
X=(Y+9)/8

F -1(Y) = (Y+9) /8

simple test:
F( 2 ) = 8*2-9 = 7
F -1( 7 ) = (9+7)/8 = 16/8 = 2
admin  Mar 21, 2012

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