The math problem is there, and the math problem who knows how to do it

Summary. If x=0, then left=-1≠0,y

So x≠0, so the problem is equivalent to the equation a=x2 - there is only one.

The root of the real number, let f(x)=x2 -

f'(x)=2x +1

Constructor, derivative.

x0o[2x3+ 1a

x2x2 makes 2x8+1=0, i.e. x0= -,xo)f'(x)f(x)

Therefore a< f(xo) = 2 2

v21, knowable.

Therefore, the value range of a is (- 2 2), so choose d: how to solve the math problem.

Hello. Hello.

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If x=0, then the left formula = -1≠0, and y is x≠0, so the problem is equivalent to the equation a=x2-one has only one real root, so that f(x)=x2 -1f'(x)=2x +1 constructor, the derivative of x0o[2x3+ 1a==x2x2 makes 2x8+1=0, i.e., x0= -xo)f'(x) f(x) The image is shown in the diagram. 33 Therefore a< f(xo) = 2 , it can be seen that the value range of 33 so a is (- 2 2), so d

Answer to question 8.

Answer to question 9.

okWhat about question 8??

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Question 8 choose B, and the answer to question 8 is B

The number of outputs is: 8, 4, 2, 1, 4, 2, 1,......See the pattern, from the 2nd place onwards 4,2,1 trinity group cycle (2012-1) 3 more than 1, so the output is 4 I wish you progress in learning!

Except for the first time, the output number is 8, followed by 4 2 1 The cycle of three numbers is a total of 2011 numbers, and according to the calculation, it is exactly 670 cycles with 1 remainder, then the 2012th output number is 4

Answer: 4

As you can tell from the title.

v plasticine = 10x10x9 = 900 (loose excavation rent cm) set the height of the cone to a cm

It can be set by the formula for the volume of the cone.

12²π x a=900π

The solution is that a = the height of the cone is scattered.

48 Ah, it's always a number multiplied by 2 plus 4, 3x2 = 6, plus 4 equals 10, 10x2 = 26, plus 4 equals 24, 24x2 = 48....

I feel that 486 is a multiple of 3 and 20 is a multiple of 10.

Hello. Choose D48

6 is 2 times 3, 20 is 2 times 10, and 48 is 2 times 24.

15 degrees or 105 degrees.

The perpendicular line of EF over b is n then bn bm=1 2 so bmn=30 degrees, then mbn=60 degrees, and nbc=45 degrees, so mbc=15 degrees.

In the same way, if M is below, then mbc = mbn + nbc = 105 degrees.

Solution:1. If you draw a straight line through the point o(0,0) and the point a(3,1), then the line oa is the function y=(1 3)x-cotton image;

Translate the straight line OA downwards by 1 unit to obtain the image of the function y=(1 3)x-1;

Translate the line oa upwards by 1 unit to obtain the image of the function y=(1 3)x+1.

2。Enlarge; （0，-3）。

The value of y=5x-2 reaches 10 first, and the value of y=5x-2 reaches 20 first;

This illustrates that the greater the slope of the line, the faster y changes with x.