Divide the natural numbers 1-200 into three groups a, B and C according to the following method: a (1, 6, 7, 12, 13, 18...) B (2, 5, 8, 11, 14, 17...) C (3,4,9,10,15,16...) how many numbers are there in each group? What is the last number in each group? Which group is 173?

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• 1. If 16 is divided into the sum of several natural numbers, what is the maximum product of these natural numbers?
• 2. Divide 16 into three natural numbers to make the product of these three numbers the largest, the largest is () Calculate by equation Urgent!
• 3. What is the maximum product of dividing 16 into several natural numbers
• 4. How to divide 16 into the sum of several natural numbers, which requires the product of these natural numbers to be as large as possible? My answer is 324, Montaigne,
• 5. How to divide 30 into several different natural numbers and ask the product of these natural numbers to be as large as possible?
• 6. How to divide 31 into the sum of several different natural numbers, which requires the product of these natural numbers to be as large as possible?
• 7. How to divide 195 into the sum of several different natural numbers, which requires the product of these natural numbers to be as large as possible?
• 8. Inequality expansion and contraction. Do it before tomorrow morning, add 50 points. Prove: 1 / 2n ^ 2 + 3N + 1 is less than 5 / 12, the front 2n ^ 2 + 3N + 1 is the denominator It is proved that 1 / 2n ^ 2 + 3N + 1 is less than 5 / 12 N, and 2n ^ 2 + 3N + 1 before N + is the denominator Sum.
• 9. It is proved by mathematical induction that when there is always 2 ^ n > n ^ 3 for a large enough natural number n, the first value no should be the minimum when the first step inequality is established
• 10. Prove inequality: (2-1) / (2 ^ 2-1) + (2 ^ 2-1) / (2 ^ 3-1) +. + (2 ^ n-1) / (2 ^ n + 1) - 1) > n / 2-1 / 3
• 11. What is the rule of the product of two adjacent natural numbers What's the rule of the product of two adjacent natural numbers?
• 12. If the sum of two natural numbers is 14 and their product is 48, then the two numbers are, Lie equation
• 13. The product of the sum of two continuous natural numbers multiplied by their difference is 99. The larger of the two natural numbers is 99______ ．
• 14. The product of two adjacent natural numbers is 99. What are the two numbers
• 15. The product of the sum of two continuous natural numbers multiplied by their difference is 99. The larger of the two natural numbers is () Let's set the maximum number to X and solve the equation
• 16. It is known that f (x) = ax ^ 3 + BX ^ 2 + CX (a is not equal to 0) obtains the extremum when x = ± 1, and f (1) = - 1,1) tries to find the value of constant ABC It is known that f (x) = ax ^ 3 + BX ^ 2 + CX (a is not equal to 0) obtains the extremum when x = ± 1, and f (1) = - 1,1) tries to find the value of constant ABC; 2) tries to judge whether the function obtains the minimum or maximum when x = ± 1, and explains the reason
• 17. The positions of known numbers a, B and C on the number axis are as follows: C < a < 0 < B simplify | a + B | - | c-b|
• 18. It is known that the domain of definition of function f (x) is (- 5,5) and satisfies the following conditions: F (x) is an odd function, (2) f (x) decreases monotonically on the domain of definition, (3) f (1-A) + F (2a-5)
• 19. After a decimal and its own addition, subtraction and division, the sum of sum and difference quotient is 10.4. What is the original decimal?
• 20. Monotone interval of function y = LG (1 + x) + LG (1-x)