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National
Easy
Sequences
10–12
A sequence is given by
u
n
=
3
n
−
1
u_n = 3n - 1
u
n
=
3
n
−
1
. What is
u
10
u_{10}
u
10
?
Uma sucessão é dada por
u
n
=
3
n
−
1
u_n = 3n - 1
u
n
=
3
n
−
1
. Qual é o valor de
u
10
u_{10}
u
10
?
Answer options
A.
31
B.
30
C.
27
D.
29
Check Answer
Solution
Step 1 of 3
1.
Substitute
n
=
10
n = 10
n
=
10
:
u
10
=
3
×
10
−
1
u_{10} = 3 \times 10 - 1
u
10
=
3
×
10
−
1
Next step
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