Question

let a be a rational no. and b be an irrational no. is ab necessarily an irrational?justify your answer
I know the ans is 0
because 0 is an rational no. and when we multiply it by any irrational no. the ans is the rational no-0.
but in rs aggarwal book it is written yes can you tell which ans is correct and why​

Answer 1

Answer:

if a is rational and b is irrational then the product is irrational

ex= 2× root 2 = 2 root 2 so it is irrational

but if I take 0 × root 2 = 0 which is a rational number

as it can be written in the form p by q

so you can say that rational into irrational that is a× b is always irrational except when rational number is 0

Step-by-step explanation:

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