Given a = (- 2,2), B = (2,2), find the absolute value of 2A + B, a-2b, b-2a

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• 2. If 3 ≤ a
• 3. Given 2A + B = 0, if B is greater than or equal to - 2, find the value range of A
• 4. The rational number B satisfies | 2|
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• 8. For the rational number x, if the square of X is greater than itself, then the value range of X is____ If the square of X is less than itself, then the value range of X is______ How can the second space not find such a number? If it is 0, then the square is itself, and so is 1
• 9. When x is a rational number, find the value range of X in | x | + 2010 = | x-2010 |
• 10. If the lengths of the three sides of the triangle are 4, 1-2a and 7, then the value range of a is 0
• 11. It is known that rational numbers a and B are opposite to each other, rational numbers C and D are reciprocal to each other, and rational number e is the smallest number with absolute value. The value of formula 2008 (a + b) + CD + 2008e is obtained
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• 14. The following statement is correct () A. The absolute value of a rational number must be positive B. if the absolute values of two numbers are equal, then the two numbers are equal C. If a number is positive, then the absolute value of the number is itself D. if the absolute value of a number is itself, then the number is positive
• 15. If the absolute values of two numbers are equal, then the two numbers are equal If it's wrong, it's in pairs
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• 17. 4 × 8 × 16 × 32 is expressed in the form of power
• 18. The results are in the form of power (1) (2 + 1) (2 ^ 2 + 1) keep the form of power, don't directly answer is 15 (2) (2 + 1) (2 ^ 2 + 1) (2 ^ 4 + 1), guess the results of (2 + 1) (2 ^ 2 + 1) (2 ^ 4 + 1) (2 ^ 8 + 1), and verify the results
• 19. 8^8+8^8+…… So add the eighth power =? (the result remains in power form) Come on, please Tomorrow
• 20. Where n is a positive integer, the result is