Posted by **clavin** on Thursday, June 6, 2013 at 12:01pm.

visit this link and answer the question on screen

imageshack.us/photo/my-images/17/codecogseqn1.gif/

- pllllls heeeeeeeeelp math -
**Count Iblis**, Thursday, June 6, 2013 at 12:13pm
It's trivial:

1/H_{n} - 1/H_{n-1} =

[H_{n-1} - H_{n}]/[H_{n}H_{n-1}] =

-1/[n H_{n}H{n-1}]

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**clavin**, Thursday, June 6, 2013 at 12:22pm
please tell me answer also

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**Stuck**, Thursday, June 6, 2013 at 2:56pm
How do you proceed after that?

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**Stuck**, Thursday, June 6, 2013 at 2:58pm
In the image the equals sign is a typographical error

- pllllls heeeeeeeeelp math -
**Leon jaja**, Friday, June 7, 2013 at 2:51pm
thanks for the info..I've just got the answer..:)

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