Question

ex 10 pct a si b plsss

Answer 1

Explicație pas cu pas:

a) b1*q²-b1=12

b1*q³-b1*q=36

b1*(q²-1)=12

b1*q*(q²-1)=36

b1*(q-1)*(q+1)=12

b1*q*(q-1)*(q+1)=36

1/q=1/3

q=3

b1*9-b1=12

9b1-b1=12

8b1=12

b1=3/2

b)

b1*q+b1*q²=24

b1^q⁴+b1*q⁵=-3

b*q*( 1+q)=24

b*q⁴*(1+q)=-3

1/q³=-8

q=-1/2

b1*(-1/2)⁴+b1*(-1/2)⁵=-3

b1=-96

Succes!