Take any 5 digits from 0 to 9 to form a 5-digit permutation In the number of 0-9, how many permutations of 5-digit car license plate

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• 1. 1. Write a discriminant function of prime, in the main function input an integer, output whether it is a prime information. Urgent! Thank you!
• 2. The value of the algebraic formula - 10x + 7x-4 is always less than 0
• 3. All permutations and combinations of any six numbers from 0 to 9
• 4. Write a function to determine the prime number, input an integer in the main function, and output the information whether it is a prime number
• 5. Using the collocation method, it is proved that the value of the algebraic formula - 10x2 + 7x-4 is always less than 0. From the above conclusion, can you write three quadratic trinomial formulas whose values are always greater than 0, and the coefficients of the quadratic terms are l, 2, 3?
• 6. There is a cube with the number 123456 written on six sides I didn't expect it to be so difficult There is a cube with the numbers 1, 2, 3, 4, 5 and 6 written on its six faces. Three people observe it from different positions, and the results are shown in the figure below
• 7. Simplify, (2 √ 9 + √ 27) of √ 3 3 √ 2 (√ 8 - √ 18) (√ 18 + √ 32) of 3 √ 2
• 8. In the system of equations, if the values of a pair of X and Y in 4x + k = 7 and 3x-5y = 16 are equal, what is the value of K, and the solution of the system of equations is obtained
• 9. -X-5y + 3x-2y merge the same kind
• 10. 3x-5y-6x-7y + 9x-2y, can you help me solve this problem of merging similar terms and teach me how to solve it
• 11. It is proved that: - 10x2 + 7x-4 is less than 0
• 12. Write a function to determine the prime number, input an integer in the main function, and output the information whether it is a prime number or not solve
• 13. How many groups of 6-digit numbers can you combine with 0-9? What are these numbers?
• 14. It is proved that: - 10x2 + 7x-4 is less than 0
• 15. Input integer m in the main function, store all prime numbers greater than 1 and less than integer m in the index group of XX Institute in function fun, and pass the number of prime numbers back to the main function. For example, input 25, then output 23571113191923; Requirements: the input of integer m and the output of prime number and prime number are completed in main function; The fun function stores all prime numbers greater than 1 and less than integer m into the index group of XX Institute, and transfers the number of prime numbers back to the main function through K;, The FUN function is called in the MAIN function.
• 16. How many three digit numbers can be made up of 1,2,3,4,5,6,7? How to do it with permutation
• 17. Given that C is a real number and the opposite number of a root of equation x2-3x + C = 0 is a root of equation x2 + 3x-c = 0, find the solution of equation x2 + 3x-c = 0 and the value of C
• 18. Write function fun, the function function is to find less than or equal to Lim all prime numbers and put in the AA array, the function returns the number of prime numbers. The statements given in function fun are for reference only Ask how to do it
• 19. Use the number 123456 to form the number of four digits without repetition and the odd number is not adjacent
• 20. Given that the distance between two points a (1,63), B (0,53) and line L is equal to a, and such line l can be made into four, then the value range of a is______ ．