Question

no entiendo nada, ayudaaa​

Answer 1

A.
a(395)= - 5 +4n
A(395)= - 5 +4(395)
a(395)= 1575

2011= —5 + 4n
2016= 4n
504 = n

B.
Razón=
a(2) = a1.r
2= 4.r
$\frac{1}{2} = r$
Término general a(10)
a(10)= a(1).r^(10-1)
a(10)= 4.
${( \frac{1}{2} )}^{9}$
a(10)=
$4 \: x \: \frac{1}{512} = \frac{1}{128}$
C.