Determine 3746

Determine the third and fourth member of GP if q = -0.6 and a1 + a2 = -0.2

Correct answer:

a3 =  -0.18
a4 =  0.108

Step-by-step explanation:

q=0.6 a1+a2=0.2 a1+q a1 = 0.2 a1=0.2/(1+q)=0.2/(1+(0.6))=21=0.5 a2=q a1=(0.6) (0.5)=103=0.3 a3=q a2=(0.6) 0.3=0.18
a4=q a3=(0.6) (0.18)=0.108

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