Question 1042825
{{{5^(a) - 5^(a-1) = 2500}}}



{{{5^(a) - 5^(a)*5^(-1) = 2500}}}



{{{5^(a)*(1 - 5^(-1)) = 2500}}}



{{{5^(a)*(1 - 1/5) = 2500}}}



{{{5^(a)*(5/5 - 1/5) = 2500}}}



{{{5^(a)*((5-1)/5) = 2500}}}



{{{5^(a)*(4/5) = 2500}}}



{{{5^(a)*(4/5)*(5/4) = 2500*(5/4)}}}



{{{5^(a)*1 = 3125}}}



{{{5^(a) = 3125}}}



{{{5^(a) = 5^5}}}



{{{a=5}}}



So the answer is choice C