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stonecold
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03 Jan 2017, 11:40
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E
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Difficulty:
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Question Stats:
61% (01:36) correct
39%
(01:31)
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based on 183
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What is the greatest prime factor of \(49^{19}-7^{35}\)
A) 2
B) 3
C) 7
D) 13
E) 19
A) 2
B) 3
C) 7
D) 13
E) 19
03 Jan 2017, 13:07
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stonecold
What is the greatest prime factor of \(49^{19}-7^{35}\)
A)2
B)3
C)7
D)13
E)19
A)2
B)3
C)7
D)13
E)19
\((7^2)^{19} - 7^{35} = 7^{38} - 7^{35} = 7^{35}(7^3 - 1) = 7^{35}*342 = 7^{35}*2*3^2*19\)
Answer E
27 Jan 2019, 22:17
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What is the greatest prime factor of 49^19−7^35
A) 2
B) 3
C) 7
D) 13
E) 19
A) 2
B) 3
C) 7
D) 13
E) 19
