the expression x^2/lxl<1 will always be +ve as the N is a sqaure and mod x is always +ve
the expression is true only for fractional value
s1) tells us that x can be a +ve or -ve fractional and also can be a -int hence insuff.
s2) tells us that x can be a +ve or -ve fractional and also can be a +int hence insuff....
combinig x is only a fraction and hence suff...
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