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Question
Arrange in ascending order.
`2sqrt(7), 3sqrt(2), 4sqrt(3)`
Sum
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Solution
Given: `2sqrt(7), 3sqrt(2), 4sqrt(3)`
Stepwise calculation:
1. Evaluate or compare their approximate values by expressing each as a single square root:
`2sqrt(7) = sqrt(4 xx 7)`
= `sqrt(28) ≈ 5.2915`
`3sqrt(2) = sqrt(9 xx 2)`
= `sqrt(18) ≈ 4.2426`
`4sqrt(3) = sqrt(16 xx 3)`
= `sqrt(48) ≈ 6.9282`
2. Sort these approximate values in ascending order:
`sqrt(18) < sqrt(28) < sqrt(48)`
⇒ `3sqrt(2) < 2sqrt(7) < 4sqrt(3)`
So, the numbers in ascending order are `3sqrt(2) < 2sqrt(7) < 4sqrt(3)`.
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Chapter 1: Rational and Irrational Numbers - Exercise 1D [Page 28]
