Question

if <1= <4 and <4= <3 ,show that <1= <3

Answer 1

$if \: < 1 = < 4 \\ \\ < 4 = < 3 \\ replacing \: value \: of \: < 4 \: by < 1 \\ hence \\ < 1 = < 3 \\ \\ proved$
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