What's the urgency of getting a zero score in senior one mathematics! detailed
That is, the function value can be equal to 0, which is reflected in the image that the function has an intersection with the X axis, and there are several zeros when there are several intersections.
There are several solutions for f(x)=0.
For the continuous function f(x) on [x 1, x2], if the signs of f(x 1) and f(x2) are different, then the zero point of f (x) (the solution of f (x) = 0) is on (x 1, x2).