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Question Number 91085 by jagoll last updated on 28/Apr/20
$${f}\left({x}\right)\:=\:\lceil\mathrm{2}{x}−\mathrm{1}\rceil\: \\ $$$${f}\left(\mathrm{3}\right)\:,\:{f}\left(\mathrm{4}\right)\:=\:? \\ $$
Commented by M±th+et+s last updated on 28/Apr/20
![if [...] is ceil f(3)=⌈6−1⌉=⌈5⌉=5 f(4)=⌈7⌉=7](Q91087.png)
$${if}\:\left[...\right]\:{is}\:{ceil} \\ $$$${f}\left(\mathrm{3}\right)=\lceil\mathrm{6}−\mathrm{1}\rceil=\lceil\mathrm{5}\rceil=\mathrm{5} \\ $$$${f}\left(\mathrm{4}\right)=\lceil\mathrm{7}\rceil=\mathrm{7} \\ $$