Question

Is root 21 rational or irrational. give reason​

Answer 1

Answer:

irrational

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Answer 2

Root 21 is irrational because the values after decimal will never stop.

A number is said to be irrational if it cannot be expressed in the form of a ratio p/q, where q not equal to 0.

√21 = 4.58257569495584 which is a non terminating decimal. Thus √21 is irrational.

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