NCERT Example 11 - Number Systems

Question: Check whether 7sqrt(5), 7/sqrt(5), sqrt(2) + 21, pi - 2 are irrational.

Answer: All four — 7sqrt(5), 7/sqrt(5), sqrt(2) + 21 and pi - 2 — are irrational.

Full step-by-step NCERT solution with diagrams on Something by Zero.

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