- IIT JAM
- Mathematics (MA)

- Shashi ranjan sinha Best AnswerS is countable implies f(S) is countable, doesn't matter f is one-one or not......but if T is uncountable, then f is one-one implies f(T) is uncountable and in case f is not one-on...Show moreLikes(0) Reply(1)Shashi ranjan sinhaso, options 1 and 2 are true
- Deepak singhsince S is countable then f(S) is always countable either f is one one or not .. and f(T) may be uncountable . So option a and b are correctLikes(0) Reply(0)
- PiyushOption ABD are correctLikes(0) Reply(0)