Mathematics
Separate the rationals and irrationals from among the following numbers :
(i) -8
(ii)
(iii)
(iv)
(v) 0
(vi) π
(vii)
(viii)
(ix)
Rational Irrational Nos
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Answer
(i) -8 can be expressed in the form of , where p and q are integers and q ≠ 0.
Hence, -8 is a rational number.
(ii)
Thus, can be expressed in the form of , where p and q are integers and q ≠ 0.
Hence, is a rational number.
(iii) can be expressed in the form of , where p and q are integers and q ≠ 0.
Hence, is a rational number.
(iv) is square root of non-perfect square i.e. 8.
Hence, is an irrational number.
(v) 0 can be expressed in the form of , where p and q are integers and q ≠ 0.
Hence, 0 is a rational number.
(vi) π is a non-terminating and non-repeating decimal.
Hence, π is an irrational number.
(vii) is cube root of non-perfect cube i.e. 5.
Hence, is an irrational number.
(viii) is a repeating decimal.
Hence, is a rational number.
(ix) is square root of non-perfect square i.e. 3.
Hence, is an irrational number.
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