- #1

TitoSmooth

- 158

- 6

My question is.

Lim (x^2+1)=1

x→0

not sure what values let's call them K. ie -K≤x^2+≤K.

for instances when I have.

Lim xsin(1/x)=0

x→0

i say. -1≤sin(1/x)≤1

then multiply the whole inequality by x.

-x≤xsin(1/x)≤x

therefore limit as x approaches 0 of sin(1/x)=0

how would I do it for for non trig functions?