but when X is big enought, 2X is big too, but sin(3X) remains between -1 and 1... doesn´t it lead you to somewhere?
and i cant use anything but thisdefinition to solve it
we need to prove that for every N>0 there is M>0 so for every x>M
we have f(x)>N .
i have a solution of a similar question:
the solution is:
we take we find M that fits it.
we clame that M=
if x>M then x>
i cant use the similar question because i cantisolate x on one side.