Bob

]]>but

because when you add the indices you get zero and anything to the power zero is 1.

As for

the top factorises to

and then the top and bottom brackets cancel out.

As for learning the rules why not start with

http://www.mathsisfun.com/algebra/exponents-logarithms.html

The main 'Maths Is Fun' pages are full of explanations and exercises.

Try the page and post again if you are still unsure about anything.

Bob

]]>coz this is where I was stuck! e^x+e^-x so is it equals to 0

Whatever you do, do not that!

]]>I meant this

I know the steps, what I dont know is how to compute this

coz this is where I was stuck! so is it equals to 0 (zero)?if not, can you show me the last steps till we get only "2" at the end by canceling or subtracting .. -->

annd can you tell me where can i find how to deal with exponents and natural log by learnin some rules/law about them

really big help if u show me the way!

cheers

]]>By 'solve' do you mean 'simplify'?

Extra brackets not needed

Or did you mean:

Let's try both

(i)

so

or

(ii)

so

Oh! That was a surprise!

Bob

]]>here we have:

we need to solve this:

thx.:)

]]>