Question

So sánh:

A=(3+1)(3²+1)(3⁴+1)(3⁸+1)(3¹⁶+1) và B=3²²-1

Answer 1

A=(3-1)(3+1)(3²+1)(3⁴+1)(3⁸+1)(3¹⁶+1)

A= (3²-1)(3²+1)(3⁴+1)(3⁸+1)(3¹⁶+1)

A= (3⁴-1)(3⁴+1)(3⁸+1)(3¹⁶+1)

A= (3^8_1)(3⁸+1)(3¹⁶+1)

A= (3¹⁶-1)(3¹⁶+1)

A=3²²-1

Vậy A=B

Answer 2

A thành 2A Vậy 2A=B^>A