You can put this solution on YOUR website! Anything raised to the zero power is 1 for all a. A negative exponent means take the reciprocal, that is: , in other words, move the variable from denominator to numerator or from numerator to denominator and change the sign.
So for your first problem, in order for the a term to go away and remain non-zero, the exponent on a has to be 1, so you can say right off that . The b variable is in the denominator in the left hand fraction and in the numerator in the right hand fraction. That means the 3 exponent on b on the right must have been -3 on the left. .
You should be able to handle the rest of them by applying the same principles.
