Put 1 exponents so everything will show an exponent:
First do this part: ,
Then replace by
Inside the parentheses add exponents of a and of b:
Now we're ready to remove the parentheses by multiplying
every inner exponent top and bottom by the outer
exponent :
Move from numerator to denominator and
change the sign of the exponent, and write
on the bottom.
Likewise, move from denominator to numerator and
change the sign of the exponent, and write
on the top.
Subtract exponents, larger minus smaller, and place the
result in the numerator or denominator, depending on
which one had the larger exponent before.
So we subtract exponents of a, or
and place this on the top since the exponent was
larger than the exponent and was on the top.
We eliminate from the bottom:
Finally we subtract exponents of b, or
and place this on the bottom since the exponent was
larger than the exponent and was on the bottom.
We eliminate from the top:
Edwin
