How much is minus one minus one? Such as the title
According to the calculation rule of negative numbers, subtracting a negative number is equal to adding its opposite number, so subtracting - 1 is equal to adding + 1, so they are equal to 0
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- 1. In integers, there are a number of symmetric numbers, such as 779395115, which are called palindromes
- 2. Sum (2-3 * 5 ^ - 1) + (4-3 * 5 ^ - 2) +... + (2n-3 * 5 ^ - n) As the title I don't know if I wrote the wrong question. Can the last n be equal to 71? If I wait, the answer is much better? Wrong, the last negative n can be changed to 71? ..
- 3. A three digit minus the sum of its digits, the difference 46a is still a three digit, try to find the number a =?
- 4. How much is one tenth minus 11 and one fifth
- 5. Palindrome number, for example, to multiply 77 by 78 equals 6006. I also need a formula,
- 6. Sum: 1-2 + 3-4 + 5 +(2n-1)-2n= Sum: 1-2 + 3-4 + 5 +(2n-1)-2n=
- 7. Design an algorithm to find all such three digits, which are equal to the sum of the cubes of its digits. Use QBASIC program to solve Design an algorithm to find all such three digits. These three digits are equal to the sum of cubes n=100 x=1 y=0 i=0 Do IF n=x^3+y^3+i^3 THEN PRINT n END IF n=n+1 i=i+1 IF i>9 THEN i=0 y=y+1 END IF IF y>9 THEN y=0 x=x+1 END IF LOOP UNTIL n>=1000 END
- 8. How much is minus three minus five
- 9. Judge whether a number is palindrome number or not?
- 10. Sequence summation, limit value p = 1 / 4 + 2 / 8 + 3 / 16 + 4 / 32 +. + n / [the (n + 1) power of 2] P = 1 / 4 + 2 / 8 + 3 / 16 + 4 / 32 +. + n / [the (n + 1) power of 2] Find the simplest expression of P and the limit value of P
- 11. A three digit minus the sum of its digits, the difference is still a three digit 38a?
- 12. Sum 1 / 2 + 3 / 4 + 5 / 8 +. + (2n-1 / 2)
- 13. In integers, there are a number of symmetric numbers, such as 779395115, which are palindromic numbers. Please help me write some examples,
- 14. If you remove 28, 42 and 56 with an input, you can exactly divide them. The maximum number is
- 15. Find the first n terms and Sn of sequence 3 / 2,9 / 4,25 / 8,65 / 16161 / 32 The first n terms and Sn of sequence 3 / 2,9 / 4,25 / 8,65 / 16161 / 32,
- 16. How many four palindromic numbers are there in 3000 to 5000 natural numbers For example, 45543333 are palindromic numbers
- 17. How much is one third minus one fourth?
- 18. You can divide 28 and 56 by a number. What's the maximum number
- 19. Sequence 3 / 2,17 / 4,57 / 8161 / 16. The first n terms and Sn
- 20. We call the natural numbers with symmetrical arrangement of left and right numbers palindromic numbers, such as 505, 31731 (1)①121=11² ,13 321=111² 1 234 321=( )12 345 654 321=( ) ②14 641=( ) ③40 804=( ) ④44 944=( )