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Do you think it is a fault within the question? I doubt it as the question comes out of Cambridge...

Hey guys, question 21 is the one i need help with. Its been bugging me for a while im sure im doing something silly but after numerous attempts all i seem to get is that (p+q)^2=4pq.:confused::confused: Help is much appreciated! :spin::spin:

Would you consider this somewhat of a difficult question for a 2 Unit student?

1+2x/(1+x^2)+ (2x)^2/(1+x^2)^2+... Like that?

Thanks Enigma!!! But what about question g) ??

Yes I know for the second part of the question, but that doesn't apply to the first part, which asks for the condition for the GP to have a limiting sum

Hello, limiting sums question from 3 Unit Cambridge, last question in the exercise. 17. Find the condition for each GP to have a limiting sum, then find that limiting sum: a) 1+(x^2-1)+(x^2-1)^2+... g) 1+2x/1+x^2+ (2x)^2/(1+x^2)^2+... I understand that -1< r< 1, however, when I substitute r, I...

Yep, my mistake it asked for the sixth term! Thank you very much, much appreciated :)

This question is from the Cambridge yr 11 2 Unit textbook. This question comes from the section regarding only the formula for the nth term of an A.P. Q10. B) The fourth, sixth and eighth terms of an AP add to -6. What is the eighth term? Help is much appreciated! :rolleyes::caffeine: