Question

prove that 2+4÷5√7 is irrational​

Answer 1

Answer:

2+4÷5√7

Let be,

2+4÷5√7

6÷5√7

5√7= a6

√7= a6/5b

This shows (a6/b5) is a rational number, √7 is irrational number

Because we know that √7 an irrational number

Answer 2

2+4=577

Let be,

2+4577

6-517

517= a6

17= a6/5b

This shows (a6/b5) is a rational number,

17 is irrational number

Because we know that v7 an irrational number