3)Reduza a uma só potência a) 5^4:5^2= b) 8^7:8^3= c) 9^5:9^2= d) 4^3:4^2= e) 9^6:9^3= f) 9^5:9= g) 5^4:5^3= h) 6^6:6= i) a^5:a^3= j) m^2:m= k) x^8:x= I) a^7:a^6=

a) $$5^{4}:5^{2} = 5^{4-2} = 5^{2}$$
b) $$8^{7}:8^{3} = 8^{7-3} = 8^{4}$$
c) $$9^{5}:9^{2} = 9^{5-2} = 9^{3}$$
d) $$4^{3}:4^{2} = 4^{3-2} = 4^{1}$$
e) $$9^{6}:9^{3} = 9^{6-3} = 9^{3}$$
f) $$9^{5}:9 = 9^{5-1} = 9^{4}$$
g) $$5^{4}:5^{3} = 5^{4-3} = 5^{1}$$
h) $$6^{6}:6 = 6^{6-1} = 6^{5}$$
i) $$a^{5}:a^{3} = a^{5-3} = a^{2}$$
j) $$m^{2}:m = m^{2-1} = m^{1}$$
k) $$x^{8}:x = x^{8-1} = x^{7}$$
l) $$a^{7}:a^{6} = a^{7-6} = a^{1}$$