4 ms·
(a-bx) is not zero, x is a variable. when x=pi, a-bx is zero, otherwise not. a-bx=0 is an equation whose solution is x=pi. The function f(x) is not identically
by omaranto 11y ago
(a-bx) is not zero, x is a variable. when x=pi, a-bx is zero, otherwise not. a-bx=0 is an equation whose solution is x=pi. The function f(x) is not identically zero, it is however zero when evaluated at x=pi: f(pi)=0.
- phkahler 11y agoAnd he does talk about f(pi) quite a bit. It's not like there are limits being discussed where we should consider something in the neighborhood of a 0/0 situation. He evaluates it at pi, and in doing so could just put a zero in there.