Even function: F(x)=F(-x)

Second,

Periodic function: F(x+T)=F(x)

T

This is a cycle.

Third, the operation of the function: the domain of F(x) and G(x) is D 1, D2, D=D 1nD2 is not equal to an empty set.

and

F+G

(F+G)(x)=F(x)+G(x)

X belongs to d

(So is the difference.)

gather

(F*G)(x)=F(x)*G(x)

X belongs to d

business

(F/G)(x)=F(x)/G(x)

X belongs to d

{

X 1G(x)=0

X belongs to D}

Fourth, the elementary function:

Exponential function: y = x power of a

(a & gt0

A is not equal to 0)

Power function:

Y=X to the u power

(u belongs to r and is a constant)

Logarithmic function: y=log

a

X

(a & gt0

A is not equal to 0)

Trigonometric function: y=sinx

y=cosx

y=tanx

y=cotx

Inverse function:

y=arcsinx

y=arccosx

y=arctanx

y=arccotx

Y = x power of u = a of ulog

a

X

force

If you want to learn math well in high school, you must first have confidence in yourself. No matter what your junior high school math scores are, they have become history. Secondly, listen carefully in class, take notes carefully, and do topics after class. The main topics are textbooks, do more, think more, think more, write down the topics that you can't, do more, think more, and think more when you have nothing to do. If you don't understand, discuss with your classmates and indirectly turn theoretical things into practical things.