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Class 10MathematicsReal NumbersProof of irrationality of √2, √3, √5Easy
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If (\sqrt{5}=\frac{p}{q}), what is obtained after squaring?

Answer and explanation

Correct answer: (p^2=5q^2)

Step 1: Squaring both sides gives (5=\frac{p^2}{q^2}). Step 2: Multiplying by (q^2) gives (p^2=5q^2). Step 3: Write the denominator-clearing step clearly.

Related tags

Sqrt5 ProofSquaringClass 10Proof Of Irrationality Of √2√3√5Proof Of Irrationality Of 2 3 5Real NumbersMathematicsClass 10 Mcq
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10 more MCQs
  1. 1Which assumption is taken first to prove that (\sqrt{2}) is irrational?
  2. 2If (\sqrt{2}=\frac{p}{q}), what is obtained after squaring both sides?
  3. 3From the equation (p^2=2q^2), what do we learn about (p^2)?
  4. 4If (p^2) is even, which conclusion about (p) is correct?
  5. 5If (p) is even, in which form can (p) be written?
  6. 6What conclusion is obtained by putting (p=2k) in (p^2=2q^2)?
  7. 7What is the final contradiction in the proof of (\sqrt{2})?
  8. 8What is the correct final conclusion of the proof of (\sqrt{2})?
  9. 9If (\sqrt{3}) is assumed rational, in which form is it written?
  10. 10If (\sqrt{3}=\frac{p}{q}), which equation is obtained after squaring?
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