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2014-09-04T01:51:28-03:00
An = a1 + (n-1)r
A32= 1/4 + (31.2)
A32= 1/4 + 62
A32= 1 + 248
A32= 249
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  • Usuário do Brainly
2014-09-04T03:38:33-03:00
a_n=a_1\cdot q^{n-1}

a_1=\dfrac{1}{4}, q=2, a_n=32:

32=\dfrac{1}{4}\cdot2^{n-1}

2^5=2^{-2}\cdot2^{n-1}

2^{n-1}=\dfrac{2^{5}}{2^{-2}}

2^{n-1}=2^{7}

n-1=7

n=8

(1/4,1/2,1,2,4,8,16,32)
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