1, monotonicity of function
(1) set
The world is increasing its functions;
Up is a decreasing function.
(2) Let the function be differentiable in a certain interval, and if it is, it is increasing function; If so, it is a decreasing function.
2. The parity of the function
It is an even function for any one of the domains;
For any one of the domains, there is a odd function.
The images of odd functions are symmetrical about the origin, and the images of even functions are symmetrical about the Y axis.
3. The geometric meaning of the derivative of the function at this point.
The derivative of a function at a point is the slope of the tangent of the curve at a point and the corresponding tangent equation.
Extended data:
Arithmetic progression's general formula: an-a 1-(n- 1) d
Sum of the top n items in arithmetic progression: sn = [n (a1+an)]/2 = na1+[n (n-1) d]/2.
Geometric series formula: an = a1* q (n-1);
Sum of the first n terms of geometric series: Sn = a1(1-q n)/(1-q) = (a1-a1q n)/(1-q).
Baidu Encyclopedia-Mathematical Formula