Melody

A half of a whole is a half   

$$\\2-\frac{2}{x}\div 3-\frac{1}{x}\\\\
=2-\frac{2}{x}\div \frac{3}{1}-\frac{1}{x}\\\\
=2-\frac{2}{x}\times \frac{1}{3}-\frac{1}{x}\\\\
=2-\frac{2}{3x}-\frac{1}{x}\\\\
=2-(\frac{2}{3x}+\frac{3}{3x})\\\\
=2-\frac{2+3}{3x}\\\\
=2-\frac{5}{3x}\\\\
or
=\frac{6x-5}{3x}$$

aaso an $$\pm 1\quad and \quad \pm121$$

There is a calc on the home page for that. :)

Sorry anon - That is not correct.

you need to use the binomial expansion

I am on my phone at the moment so it is all to difficult for me right now.

if no one gives a timely answer why not Google  binomial expansion and watch a you tube presentation.

it would most likely be easier to understand anyway. :)

Ln is log base e

Lets see.

In the insert drop down box is special characters     

the integra sign is 3rd row 9th across        ∫     the rest I would just enter by normal typing.

OR

if i enter      int(3x)      int the maths formula input box     I get      $$\int{\left({\mathtt{3}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)}{d{\mathtt{x}}}$$

OR

if you use the   LaTex Formula input box     you can type in   \int(3x)dx  and you will get    $$\int(3x)dx$$

@@ End of Day Wrap    Wed 15/7/15     Sydney, Australia Time   11:20pm   ♪ ♫

Hi to all those who are still  in attedance. :)

Great answers were presented today by Alan, Heureka, Geno3141, TitaniumRome and HeatherF.  Thank you :)

inverse trig is the same as arc trig

so use asin and acos