-8, - 3,3,10,18, [], [] find the rule and fill in the number

-8, - 3,3,10,18, [], [] find the rule and fill in the number

Well, from left to right, add 5, 6, 7, 8 to each number
So we can infer that the number after 18 should add 9 to be 27,
27 should be followed by 10, which is 37

What's the number 50 in the first grade of junior high school mathematics according to the rule: 0,3 / 5,8 / 7,5 / 3

2499 / 101, the general term is (square of n-1) / (2n + 1)

Fill in the number according to the rule: 1 / 2, - 4 / 5,9 / 10, - 16 / 17
Fill in the number according to the rule: 1 / 2, - 4 / 5,9 / 10, - 16 / 17____________ (expressed by the formula containing n)

Item 1 1 / 2
Item 2 - 2 & sup2 / 2 & sup2; + 1
Item 3 3 & sup2 / 3 & sup2; + 1
Item 4 - 4 & sup2 / 4 & sup2; + 1
.
The nth term [- (- 1) nth power * n & sup2;] / N & sup2; + 1
If n is odd, it is positive; if n is even, it is negative

Let √ 3 = a, √ 30 = B, and use the algebraic expression of AB = (√ 0.9) × (√ 10) × (√ 90)
Is the root sign

(√0.9)×(√10)×(√90)
=√(0.9x10)x√(3x30)
=√(3x3)x√3x√30
=√3x√3x√3x√30
=a^3 b