The first four terms are 3 / 5, 4 / 8, 5 / 11, 6 / 14 Then a general formula of the sequence is
Molecule: n + 2
Denominator: 3N + 2
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- 2. How much is 31 degrees minus 15 degrees
- 3. If the square of a number is 64, what is the number?
- 4. Sequence summation 1 / 1 * 2 + 1 / 2 * 3 + 1 / 3 * 4 +... + 1 / 9 ^ 10
- 5. 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 are filled in the square, so that the sum of the three numbers in the horizontal, vertical and oblique rows is the same?
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- 10. What is one minus one
- 11. If 100 and 168 are added to a positive integer, two complete squares can be obtained. Then the positive integer is______ .
- 12. How much is minus 8 minus 15 plus minus 9 minus 12?
- 13. C # how to realize such a three digit number, which is exactly equal to the cubic sum of each digit
- 14. Write out a general term formula of the sequence, so that the first four terms are 1 + 1 / 2 ^ 2,1-3 / 4 ^ 2,1 + 5 / 6 ^ 2,1-7 / 8 ^ 2
- 15. Proof: the product of four consecutive integers plus 1 is the square of an integer
- 16. How much is minus 8 minus 15 plus minus 9 minus 12?
- 17. Sequence summation ∑ (2 / 7 ^ N-5 / 2 ^ n), (that is to sum 2 / N of 7 minus 5 / N of 2) ∑(2/7^n-5/2^n)=(2/7+2/7^1+2/7^3.+2/7^n)-(5/2+5/2^2+5/2^3+.5/2^n)= 1/3[1-(1/7)^n]-5[1-(1/2)^n]=1/3-5 What is the sum formula? What is the formula? Where do the 1 / 3 and 5 come from?
- 18. Java to determine a number of digits and whether it is palindrome number
- 19. How much is minus 5 minus 65?
- 20. A three digit number is the sum of its digits plus the cubic sum of its digits It seems that none of you can see the sum of your numbers + the cubic sum of your numbers