x+lgx=3
lgx=3-x
Both sides of the equal sign are monotonous, and the picture shows that,
Only one x value matches.
When x= 1, the left side =0 and the right side =2.
Left to right =0 when x=3 > 0.
therefore
The value of x is 1 to 3.
When x takes 2,
Left = lg2
Right = 1
So x takes a value between 2 and 3.
k=2
Mathematics is a variety of proof skills. Do sophomores learn math handwritten newspapers? The following are the pictures and m