Question 176834
Anything raised to the zero power is 1 {{{a^0 = 1}}} for all a.  A negative exponent means take the reciprocal, that is:  {{{a^(-n)=1/a^n}}}, 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 {{{n=1}}}.  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.  {{{m= -3}}}.


You should be able to handle the rest of them by applying the same principles.