that whether ivi (b) Let U, T be usual and cofinite topologies on se:t of real numbers R and f be a map from R into R such that f(x)=1x-21 for any xER, show t.hat wheter f is U-T continuous or not and...

Extracted text: that whether ivi (b) Let U, T be usual and cofinite topologies on se:t of real numbers R and f be a map from R into R such that f(x)=1x-21 for any xER, show t.hat wheter f is U-T continuous or not and T---U continuous or not. (c) Let f be a map from a space(X, T).into a space (Y, t) and t, Tzsuch that TSt and tS T,, show that whether if f is T,---t open map then f is t-- -t open map then f is t --- Topen map or not. open map or not, and if f is r--- てくててーでcfennaPうてーモ 。 てこて。 To Hoad of Dept.