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题目内容
What is the value of $$\frac{0.99999999}{1.0001}$$ - $$\frac{0.99999991}{1.0003}$$?
x+y=7

Quantity A

x+2y

Quantity B

y+2x


3x+3 < 2y

Quantity A

x

Quantity B

y


z=x-2y

Quantity A

The average of x and z

Quantity B

x-y


xy+y < 0

Quantity A: x

Quantity B: y
0 < x < 1, n > 0

Quantity A

$$\frac{n}{x}$$

Quantity B

n


x is a real number

Quantity A

$$\frac{x}{x+1}$$

Quantity B

1


Quantity A:$$(2m+1)^{2}$$

Quantity B:$$(2(m+1))^{2}$$
2 < x < 5,$$\frac{1}{10}$$ < y < $$\frac{1}{5}$$

Quantity A: x+y

Quantity B: $$\frac{1}{x}$$+$$\frac{1}{y}$$

Quantity A

The square of the average of x,y and z

Quantity B

The average of $$x^{2}$$,$$y^{2}$$and $$z^{2}$$


0 < a< b < 1 < c < d, c and d are both integers

Quantity A

$$a^{c-d}$$

Quantity B

$$b^{d-c}$$


0 < x < y

Quantity A

x+$$\frac{1}{x}$$

Quantity B

y+$$\frac{1}{y}$$


x and y are positive real numbers

Quantity A

$$\sqrt{(x^{2})(y^{5})}$$

Quantity B

$$\sqrt{(x^{3})(y^{5})}$$


$$ x\geq 0$$

Quantity A:$$2^{x}+2^{x}+2^{x}+2^{x}$$

Quantity B:$$4^{x}+4^{x}$$
x=$$2^{50}$$

y=$$2^{50}$$-1

z=$$2^{50}$$-2

Quantity A

$$x^{2}$$$$z^{2}$$

Quantity B

$$y^{4}$$


x > 0

Quantity A

$$2^{4}$$+$$\sqrt{x}$$

Quantity B

$$4^{2}$$+$$\sqrt{x^{2}}$$


Quantity A

$$3^{12}$$

Quantity B

$$5^{8}$$


The half-life period of 10 grams of a certain radioactive element is an hour. If the mass of the element drops to 0.1~1 grams after N hours, then N COULD be which of the following?

Indicate all such values.
If n is a positive integer and $$0.5^{n}$$ < 0.0002, what is the least possible value of n?
If a is an integer greater than 1, what is the possible value of $$(1+\frac{1}{a})^{-1}$$?
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