Question

1. So sánh \(2^{91}\)và \(5^{35}\)

Answer 1

2\(^{91}\)>2\(^{90}\)=(2\(^5\))\(^{18}\)=32\(^{18}\)>25\(^{18}\)=(5\(^2\))\(^{18}\)=5\(^{36}\)>5\(^{35}\)

Vậy 2\(^{91}\)>5\(^{35}\)

Answer 2

ta có:
2^91 = (2^13)^7 = 8192^7
5^35 = (5^5)^7 = 3125^7
Vì 8192^7 > 3125^7 nên 2^91 > 5^35