Question 38029
 write the first four terms of the sequence a1=-3, an=(-2)an-1;n=2,3,4,... How do I do this problem? 
Is the answer -3,-5,-7,-9 or did I do it wrong? 

a(n)=-2[a(n-1)]
a(1)=-3
a(2)=-2(-3)=6
a(3)=-2(6)=-12
a(4)=-2(-12)=24
Cheers,
Stan H.