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Lady bird [3.3K]
4 years ago
10

Consider the following geometric sequence. -5, 10, -20, 40,... If the recursive formula for the sequence above is expressed in t

he form an=b(cn-1)nwhat is b and c
Mathematics
1 answer:
andrew11 [14]4 years ago
3 0
The formula of the geometric sequence is the following :
u_n=bc^{n-1} wherein b is the first term and c is the rate. 
From the given data we deduce the parameters:
c=\dfrac{10}{-5}=-2,b=-5 
Therefore:
u_n=-5(-2)^{n-1} 
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