Binomial Theorem And Its Simple Applications Question 85
$ 10^{n}+3(4^{n+2})+5 $ is divisible by $ 7 $ for all $ n\in N $
Options:
A) 7
B) 5
C) 9
D) 17
Show Answer
Answer:
Correct Answer: C
Solution:
- [c] $ 10^{n}+3({4^{n+2}})+5 $ Taking $ n=2; $
$ 10^{2}+3\times 4^{4}+5=100+768+5=873 $ Therefore, this is divisible by 9.
BETA
