How much minus how much is equal to 17 and opposite to each other and sum to 2

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• 1. What's the difference between minus 1 / 2 plus minus 2 / 3 plus minus 5 / 6?
• 2. How much is one plus one plus two plus three plus four plus five plus six plus seven
• 3. One plus minus two plus three plus minus four plus five plus minus six Plus 2011 plus minus 2012 plus 2013 equals
• 4. One minus two plus five and one plus five plus one minus one plus three and four plus four and five plus two and three is equal to?
• 5. If 1 / 2 of a = negative 5, the opposite number of a is? To? And the number is?
• 6. Given that a is the opposite number of 5 and B is 2 larger than the opposite number of a, how much larger is a than negative B
• 7. Negative five and positive five are a pair of opposite numbers. What is its practical significance
• 8. A and B / 5 are opposite to each other, and what is the negative reciprocal of a?
• 9. If A-3 and a + 1 are opposite to each other, then a=______ ．
• 10. If A-3 and a + 1 are opposite to each other, then a=______ ．
• 11. The opposite number of negative a can be expressed as (). The opposite number of negative a is equal to (). Now! 19 PM: I will raise the reward
• 12. If the opposite number of a is the largest negative integer and the opposite number of B is the smallest positive integer, then a + B=______ ．
• 13. If the opposite number of a is the smallest natural number and B is the largest negative integer, then a + (- b)=______ ．
• 14. Given a + A + A + B + B = 64, a + B + B = 56, what are a and B?
• 15. In △ ABC, a, B, C, is the length of three sides, if the square of a plus the square of B equals 25. A minus B equals 7, and C = 5, then the height of the largest side is
• 16. Given that a > 0, b > 0, a + B = 1, it is proved that (a + 1 / a) (B + 1 / b) is greater than or equal to 25 / 4
• 17. ① A > O, b > O, and a + B = 1, prove that (a + 1 / a) (B + 1 / b) is greater than or equal to 25 / 4 ② A, B belong to R and a is not equal to B. prove {1 + (square of a)} - under | root {1 + (square of B)}|
• 18. If a > 0, b > 0, a + B = 1, the square of (a + 1 / a) + (B + 1 / b) is greater than or equal to 25 / 2 Use sine and cosine functions to solve the problem
• 19. How to prove that (a + 1 / a) (B + 1 / b) is greater than or equal to 25 / 4?
• 20. 20% of a is equal to 80% of B. A is 120. What's B?