The function is $f(x)=1/x^2$.
I have to find equation of the tangent line that also goes through the point $(0,12)$.
I know how to construct this problem in desmos: https://www.desmos.com/calculator/bj1as3oqo0
So by reading the graph I know solutions are:
But how do I find this equations only by calculation? How do I figure out when the line becomes the tangent in this case?
I think I'm pretty good at understanding derivatives and tangent lines, but this one is a hard case for me.