1.

The period of `f(x)=[x]+[2x]+[3x]+[4x]+[n x]-(n(n+1))/2x ,`where `n in N ,`is (where `[dot]`represents greatest integer function).`n`(b) 1(c) `1/n`(d) none of theseA. nB. 1C. `(1)/(n)`D. none of these

Answer» Correct Answer - B
`f(x)=[x]+[2x]+[3x]+ …+[nx] -(x+2x+3x+ … + nx)`
`= -({x}+{2x}+{3x}+ … +{nx})`
Period of `f(x)=LCM (1,(1)/(2),(1)/(3), …, (1)/(n))=1.`


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