Question

prove that 9 root 7 is irrational number?

Answer 1

Answer:

latest resume that 9 root 7 is a rational number

9√7=a/b

√7=a/b×9

√7=9a/b

9a/b is a rational number

but√7 is a rational number

so our assumption is wrong

9√7 is a irrational number

thank you so much