Question

Ajutati-ma doar la EX: 20, subpunctul „a)", va rog ca am uitat :)

Answer 1

Răspuns:

Explicație pas cu pas:

a)

√(1/49) = √1/√49 = 1/7

√(1/16) =√1/√16 = 1/4

1/7 + 1/4 = 4/28 + 7/28 = 11/28

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b)

1/5 - 1/6 = 6/30 - 5/30 = 1/30

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c)

1/4 + 1/6 = 3/12 + 2/12 = 5/12

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d)

7/8 - 5/12 = 21/24 - 10/24 = 11/24

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e)

9/5 - 3/10 = 18/10 - 3/10 = 15/10 = 3/2

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f)

9/20 + 4/5 = 9/20 + 16/20 = 25/20 = 5/4