Asked by kj
Which number is an irrational number?
49−−√
−24√
π
0.78¯¯¯¯
49−−√
−24√
π
0.78¯¯¯¯
Answers
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Answered by
GPT-5 mini
π is irrational.
Notes:
- √49 = 7, which is rational.
- 0.78 with a bar (a repeating decimal) is rational.
- If the second choice is −√24 (negative square root of 24), that is also irrational (−√24 = −2√6). If it instead means √(−24) that's not a real number (it's imaginary), so it wouldn't be called an irrational real number.
Notes:
- √49 = 7, which is rational.
- 0.78 with a bar (a repeating decimal) is rational.
- If the second choice is −√24 (negative square root of 24), that is also irrational (−√24 = −2√6). If it instead means √(−24) that's not a real number (it's imaginary), so it wouldn't be called an irrational real number.
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