Question

prove that 7 root 5 irrnational number​

Answer 1

Answer:

Step-by-ste7√5 = p/q. As, we can see that p/7q ia rational so √5 should also be rational. But this contradict the fact that √5 is irrational. So, by this we can say that 7√5 is irrational number. explanation:

Answer 2

$7 \sqrt{5}$

Here,

7 is rational.

But,

we know that root 5 is not.

Or,

$\sqrt{5}$

is irrational.

Hence, a rational number multiplied by a irrational number is always an irrational number.

Hence,

$7 \sqrt{5}$

is irrational