Gate question on semigroup

saumya mishra asked Oct 27, 2017

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Can anyone please solve and explain this question clearly?

saumya mishra asked Oct 27, 2017

saumya mishra

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Refer https://gateoverflow.in/1726/gate1998_12 for detail explaination.

amaity answered Oct 27, 2017

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saumya mishra

commented Oct 27, 2017

I have seen this one but I am not getting (b) part can u please explain it?

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