Find the nth term of the sequence 5, x, 2x - 5, ...
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Step-by-step explanation:
The first term in given GP, a
1
=x
The common ratio r =
2x
4x
=2
No. of terms, n =5
Applying sum of GP formula,
S
n
=
r−1
a(r
n
−1)
=
2−1
x((2
5
)−1)
=
1
x(32−1)
=31x
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