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Show by induction that 10^n + 3(4^(n+2)) + 5 has which greatest divisor?
A18
B27
C3
D9
Answer & Solution
Correct answer: D. 9
At n = 1 the value is 207 = 9 x 23 and at n = 2 it is 873 = 9 x 97, so 9 is the greatest common divisor.
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