Q1) 1+2x+4x^2+8x^3+......
Q2) (a+x)-1+(1/(a+x))-(1/(a+x)^2)+.....
Please show all workings.....
更新1:
Thx for answering, can u show more workings....
Maths Question~Hurry, fast!!!!?
2011-03-26 4:01 pm
Find the range of values of x for which the following series converge and find the sum to infinity.
Q1) 1+2x+4x^2+8x^3+......
Q2) (a+x)-1+(1/(a+x))-(1/(a+x)^2)+.....
Please show all workings.....
Q1) 1+2x+4x^2+8x^3+......
Q2) (a+x)-1+(1/(a+x))-(1/(a+x)^2)+.....
Please show all workings.....
回答 (1)
2011-03-26 4:51 pm
✔ 最佳答案
1) For x>0, the series converges to infinity2) For 0 < x < 1 the series converges to infinity.
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https://hk.answers.yahoo.com/question/index?qid=20110326080105AABpDJ7