The law of solving mathematical problems in the first volume of the seventh grade
1 1 1,,, Numeric Arrangement Rule Question Numeric Arrangement Rule Question 1, following the following formula: 1+3 = 4 squared = 2,1+3+5 squared = 9 = 3,/. (2) Generalization: What is the sum of1+3+5+7+9+…+(2n-1)+(2n+1)? 2. What numbers should be filled in for the last two digits of the following series? 2 3 5 8 65 438+02 65 438+07 _ _ 3. Please fill in the numbers on the horizontal line below. 112358 _ _ _ 214. There is a string of numbers, and its arrangement law is1,2, 3, 2, 3, 4, 5, 4, 5, 6, .. clever. 5. There is a string of numbers 36101521_ _ What is the sixth number? 6. Observe the arrangement of the following numbers: 1, 2, 3, 4, 3, 2, 1, 2, 3, 4, 3, 2, 1, …, then the 2005th number is (). A. 1b。 If the first two digits of this 100 number are 1 0 in turn, then the number of "0" in this 100 number is _ _ _ _ _ _ _. 2222,,,,, The law of geometric change, the law of geometric change, the law of geometric change1○ ○ ○ ○ ○ ○ ○ ○ ○.