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hey answer is b)4k+2
let examples i)3k+1 -:let k=1 ,then 3k+1=4=2^2
ii)5k+1-: let k=7,then 5k+1=36=6^2
iii)5k+4-:let k=1,then 5k+4=9=3^2
but fir 4k+2 can not be expressed ___________________
hope it will help you
let examples i)3k+1 -:let k=1 ,then 3k+1=4=2^2
ii)5k+1-: let k=7,then 5k+1=36=6^2
iii)5k+4-:let k=1,then 5k+4=9=3^2
but fir 4k+2 can not be expressed ___________________
hope it will help you
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