Q:let function f from R to R define by f(t)=t^2 and let U be any nonempty open subset of R. then

a) f(U) be open

b)inverse or f(U) is open

c)f(U) is closed

d)inverse of f(U) is closed.

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- April 21st 2009, 07:28 PMMathventureAnalysis question
Q:let function f from R to R define by f(t)=t^2 and let U be any nonempty open subset of R. then

a) f(U) be open

b)inverse or f(U) is open

c)f(U) is closed

d)inverse of f(U) is closed.

- April 21st 2009, 08:21 PMTheEmptySet