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## Homework Statement

Prove that , if x is so small that terms in x

^{3}and higher powers may be neglected, then http://www.mathhelpforum.com/math-help/attachments/f37/21081d1299568824-binomial-expansion-question-msp520319eed9935g5h93hf000055b8ic10787h09a9.gif [Broken]. By substituting a suitable value of x in your result, show that (11)

^{1/2}is approximately equal to 663/200.

## Homework Equations

## The Attempt at a Solution

I can solve the first part, but i have difficulty in the second part (show that (11)

^{1/2}is approximately equal to 663/200). Can anyone help me? Thanks.

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