Question

Oblicz . Zadanie 1. a) . 3/5 + 4/7 = b). 5/7 - 1/9 = Zadanie 2. a) . 3/4 + 1 i 1/6 = b) . 5/9 - 1/6 = Zadanie 3. a) . 2 i 1/2 + 1 i 2/3 = b) . 2 i 1/2 - 1 i 1/5 = Zadanie 4. a) . 12 i 7/12 - (7 i 1/6 +2 i 3/5) =

Answer 1

Zad 1

a) 3/5+4/7 = 21/35+20/35=41/35=1 i 6/35

 

 

b) 5/7-1/9= 45/63 - 7/63 = 38/63

 

Zad 2

 

a) 3/4 + 1 i 1/6 = 18/24+1 i 4/24 = 1 i 22/24 = 1 i 11/12

 

b)5/9 - 1/6 = 10/18 - 3/18 = 7/18

 

Zad 3

 

a) 2 i 1/2 + 1 i 2/3 = 2 i 3/6 + 1 i 4/6 = 3 i 7/6 = 4 i 1/6

 

b) 2 i 1/2 - 1 i 1/5 = 2 i 5/10 - 1 i 2/10 = 1 i 3/10

 

Zad 4

 

a) 12 i 7/12 - (7 i 1/6 + 2 i 3/5) =

= 12 i 7/12 - (7 i 5/30 + 2 i 18/30) =

= 12 i 7/12 - 9 i 23/30 =

= 12 i 35/60 - 9 i 43/60 =

= 11 i 95/60 - 9 i 43/60=

= 3 i 52/60=

= 3 i 26/30

 

Answer 2

1a

3/5 + 4/7 = 21/35 + 20/35 = 41/35= 1i6/35; b). 5/7 - 1/9 = 45/63 - 7/63 = 38/63

Zadanie 2. a) . 3/4 + 1 i 1/6 =9/12+1i2/12 = 1 i 11/12

b) . 5/9 - 1/6 = 20/36- 6/36= 14/36 = 7/18

Zadanie 3. a) . 2 i 1/2 + 1 i 2/3 =2i 3/6 + 1 i 4/6 = 3i 7/6= 4 i 1/6

b) . 2 i 1/2 - 1 i 1/5 =2,5-1,2= 1,3 = 1i 3/10

Zadanie 4. a) . 12 i 7/12 - (7 i 1/6 +2 i 3/5) = 12 i 7/12 -(7 i 5/30 +2 i 18/30)= 12 i 7/12 - 9 i 23/30 = 12 i 35/60 - 9 i 46/60 = 11 i 95/60 - 9 i 46/60 = 2 i 49/60