Question

Daca a/b=4/9, aflati: 5a/5b ; a/-3b ; 13a/-4b ; b/11a ; -12b/13a.

Ajutati-ma va rogg frumoss.

Answer 1

5a/5b=a/b=4/9
a/-3b=(-1/3)x(axb)=-1/3x4/9=-4/27
13a/-4b=(-13/4)x(axb)=-13/4x4/9=-13/9
b/11a=(1/11)x(b/a)=9/44
-12b/13a=(-12/13)x(b/a)=(-12/13)x(9/4)=-27/13

Answer 2

a/b=4/9

5a/5b =5(a/b)=5*(4/9)=20/45

a/-3b=1/(-3) × a/b=   1/(-3) × 4/9=-4/27   

13a/-4b=13/(-4) × a/b=13/(-4)  × 4/9=  =13/9

b/11a =1/11 ×b/a=1/11×9/4=9/44

-12b/13a=-12/13 × b/a =-12/13 × 9/4 =-27/13