+) 4M = \(\dfrac{4^{13}+4}{4^{13}+1}=1+\dfrac{3}{4^{13}+1}\)
+) 4N = \(\dfrac{4^{14}+4}{4^{14}+1}=1+\dfrac{3}{4^{14}+1}\)
Có 413+1 < 414+1
⇒ \(\dfrac{3}{4^{13}+1}\) > \(\dfrac{3}{4^{14}+1}\)
⇒ \(1+\dfrac{3}{4^{13}+1}\) > \(1+\dfrac{3}{4^{14}+1}\)
⇒ 4M > 4N
⇒ M > N
Nếu mà có sai sót gì thì cho mình xin lỗi nhé