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proe-that-f-x-x-x-increase-in-R-




Question Number 86552 by M±th+et£s last updated on 29/Mar/20
proe that  f(x)=x+[x]   increase in R
$${proe}\:{that} \\ $$$${f}\left({x}\right)={x}+\left[{x}\right]\: \\ $$$${increase}\:{in}\:{R} \\ $$
Commented by mathmax by abdo last updated on 29/Mar/20
f^′ (x)=1      because [x] ∈Z ⇒f is increasing at R
$${f}^{'} \left({x}\right)=\mathrm{1}\:\:\:\:\:\:{because}\:\left[{x}\right]\:\in{Z}\:\Rightarrow{f}\:{is}\:{increasing}\:{at}\:{R} \\ $$
Commented by M±th+et£s last updated on 29/Mar/20
thank you sir
$${thank}\:{you}\:{sir} \\ $$
Commented by mathmax by abdo last updated on 30/Mar/20
you are welcome.
$${you}\:{are}\:{welcome}. \\ $$

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