# pllllls heeeeeeeeelp math

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visit this link and answer the question on screen
imageshack.us/photo/my-images/17/codecogseqn1.gif/

• pllllls heeeeeeeeelp math -

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}]

• pllllls heeeeeeeeelp math -

• pllllls heeeeeeeeelp math -

How do you proceed after that?

• pllllls heeeeeeeeelp math -

In the image the equals sign is a typographical error

• pllllls heeeeeeeeelp math -

thanks for the info..I've just got the answer..:)

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