Question

Mărimi direct proportionale
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Answer 1

Răspuns:

Explicație pas cu pas:

a)

A = {2; 5; 7}

B = {6; 15; 21}

2/6 = 1/3

5/15 = 1/3

7/21 = 1/3

exista proportionalitate directa; k = 1/3

b)

A = {0,(3); 0,(5); 0,(6)} = {3/9; 5/9; 6/9}

B = {3; 5; 6}

(3/9)/3 = 1/9

(5/9)/5 = 1/9

(6/9)/6 = 1/9

exista proportionalitate directa; k = 1/9

c)

A = [4; 6; 8]

B = {6; 10; 12}

4/6 = 2/3

6/10 = 3/5

8/12 = 2/3

nu exista proportionalitate directa

d)

A = [2/3; 3/4; 4/5]

B = [5/3; 15/8; 10/5]

(2/3) / (5/3) = 2/5

(3/4) / (15/8) = 2/5

(4/5) / (10/5) = 2/5

exista proportionalitate directa; k = 2/5

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a)

2; 3; 6

4; 6; 12

2/4 = 3/6 = 6/12

b)

14; 28; 21

2; 4; 3

14/2 = 28/4 = 21/3

c)

2/5; 3/10; 1/15

12; 9; 2

d)

0,4; 0,5; 0,7

4; 5; 7