October 2020 1 80 Report
Resolvendo a inequação 1≤[tex]log _{10} [/tex](x-1)≤2, com x>1, encontramos:
a) 10≤ x ≤100
b) 10< x <100
c) 11≤ x ≤101
d) 9≤ x ≤ 99
e) 9< x <99
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