How to calculate the dislocation subtraction method in the proportional sequence? I don't quite understand this algebra

Cn=a1+ a1q+ a1q^2+ a1q^3+ … +a1q^n ……… .(1)qCn=a1q+ a1q^2+ a1q^3+ a1q^4… +a1q^n+ a1q^(n+1) …… (2) (1) - (2) we obtain that when (1-Q) CN = a1-a1q ^ (n + 1) q is not equal to 1, CN = A1 [1-Q ^ (n + 1)] / (1-Q) q = 1, CN = n A1

RELATED INFORMATIONS

1. What is the meaning of "equal difference multiplied by equal ratio" in dislocation subtraction method
2. The solution is: SN = 1 × 2 + 3 × 4 + 5 × 8 +. + (2n-1) 2 * n (this represents the nth power of 2)
3. When an = (1 / 2n-1) * (3 / 4) ^ n, how much is Sn equal to
4. An = nx2n square for Sn dislocation subtraction
5. It is known that {an} satisfies an = (3N + 1) 2 ^ (n + 1), and Sn is obtained by subtraction of dislocation
6. An = n times 3 ^ n, find Sn (dislocation subtraction, detailed process)
7. 3 sum Sn = 1 (1 / 3) + 3 (1 / 3) ^ 2 + 5 (1 / 3) ^ 3 + +(2n-1) (1 / 3) ^ n (I used the method of dislocation subtraction for a long time, but I can't solve it later
8. Sum: x + 3x ^ 2 + 5x ^ 3 +... + (2n-1) x ^ n
9. When x is not equal to 1,0, 1 + 3x + 5x ^ 2 + +What is (2n-1) x ^ (n-1) equal to
10. Given the function f (x) = 3x / x + 3 (x is not equal to negative 3, X belongs to R), the sequence {a small n} satisfies a small n = f (a small n minus 1) (n is greater than or equal to 2, n belongs to n) and A1 is unequal Given the function f (x) = 3x / x + 3 (x is not equal to negative 3, X belongs to R), the sequence {a small n} satisfies a small n = f (a small n minus 1) (n is greater than or equal to 2, n belongs to n) and A1 is not equal to 0 (1). Prove: the sequence {1 / a small n} is an arithmetic sequence (2). If A1 = 1 / 4, find the value of a small 50
11. Examples of dislocation subtraction in sequence an=4n-2 bn=2/[4^(n-1)] cn=an/bn Finding the first n terms and TN of CN of sequence
12. Using the method of dislocation subtraction to find the first n terms and the higher one sequence Given the square of. An = 4N, find the sum of the first n terms of. BN = 1 / 2-1 of an ^ 2-1
13. It is urgent to find the sum of sequence dislocation subtraction The calculation problem is urgent
14. High school mathematics what kind of sequence can use superposition to find Sn, what kind of sequence can use dislocation subtraction to find Sn, it's better to be more detailed and list all the possibilities
15. High school mathematics sequence dislocation want to reduce
16. Easy to understand, I have a poor foundation, too abstruse to understand ~
17. Senior three a round of sequence sequence sum dislocation subtraction homework master into ah It is known that the tolerance D of the arithmetic sequence an is greater than 0, and A2 and A5 are two of the equations x ^ 2-12x + 27 = 0. The sum of the first n terms of the sequence BN is TN, and TN = 1-1 / 2bn (1) Finding {an} {BN} will find that an = 2N-1, BN = 2 / 3 * [(1 / 3) of the N-1 power] (2) Note CN = anbn, find the first n terms of {CN} and Sn Is to seek the second question of dislocation subtraction!
18. When and which method should be used?
19. Which mathematician put forward these ideas first
20. What is the sum of split term subtraction, dislocation subtraction, reverse order addition and reverse order addition?