If , then what is ?
Prove that , if x is so small that terms in x^3 and higher powers may be neglected, then .
By substituting a suitable value of x in your result, show that (11)^1/2 is approximately equal to 663/200.
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.