1.{ 1,2,4,6}
2. 15
3.8
4.
5. (Square root of 0,6)
6.3/5
7.
8.2
9. Root number 2
10.- 10
1 1. 17/50 times the root number 2.
12.4/3
13.9
Method Tip: Derive a square =4b from the range of 0 and bring it into the function. After that, m and m+6 should be symmetrical about parabola, so m=-a/2-3, which brings in C.
14.
Method tip: let y = a/b and x = a/c.
Inequality can be changed into: 5/x-3; = (e to the power of x) /x
The solution set area and y range are obtained by using the image.
Y = (e to the power of x) /x This image is not easy to draw, but it can be deduced that if you decrease at (0, 1) and increase at (1, positive infinity), you can draw a rough image.