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Is 8\sqrt{8} an irrational number?\newlineChoices:\newline(A) yes\newline(B) no

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Q. Is 8\sqrt{8} an irrational number?\newlineChoices:\newline(A) yes\newline(B) no
  1. Understand irrational numbers: Understand what an irrational number is. An irrational number is a number that cannot be expressed as a simple fraction - that is, the ratio of two integers. It is a number that has a non-repeating, non-terminating decimal expansion.
  2. Simplify 8\sqrt{8}: Express 8\sqrt{8} in its simplest radical form.\newline8\sqrt{8} can be simplified by recognizing that 88 is 44 times 22, and 44 is a perfect square. Therefore, 8=4×2=4×2=2×2\sqrt{8} = \sqrt{4 \times 2} = \sqrt{4} \times \sqrt{2} = 2 \times \sqrt{2}.
  3. Determine 2\sqrt{2}: Determine if 2\sqrt{2} is an irrational number.\newline2\sqrt{2} is known to be an irrational number because it cannot be expressed as a fraction of two integers. Its decimal expansion is non-repeating and non-terminating.
  4. Conclude 8\sqrt{8}: Conclude whether 8\sqrt{8} is an irrational number.\newlineSince 8\sqrt{8} simplifies to 2×22 \times \sqrt{2} and we know that 2\sqrt{2} is irrational, the product of a rational number (22) and an irrational number (2\sqrt{2}) is also irrational. Therefore, 8\sqrt{8} is an irrational number.

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