Asked by Kelly
Write a formuls for the general term(nth term) of the arithmetic sequence. Do not use a recursion formula. Then use the formula for A to the n to find the indicated term of the sequence
find a11: 12, 10, 8,...
find a11: 12, 10, 8,...
Answers
Answered by
Damon
The first term is a1
Every subsequent term is a constant number d greater than the one before so it goes:
a1
a2 = a1 + d
a3 = a1 + 2d
a4 = a1 + 3d
a5 = a1 + 4d
.....
an = a1 + (n-1)d
for example
a14 = a1 + 13*d
Every subsequent term is a constant number d greater than the one before so it goes:
a1
a2 = a1 + d
a3 = a1 + 2d
a4 = a1 + 3d
a5 = a1 + 4d
.....
an = a1 + (n-1)d
for example
a14 = a1 + 13*d
Answered by
Kelly
makes no sense that's how i was doing it and I came up with 3.5
a11 = 12 + 10(.8444) = 3.5
however the answers to choose from are
.32
-8
-10
.34
a11 = 12 + 10(.8444) = 3.5
however the answers to choose from are
.32
-8
-10
.34
Answered by
alex
Write a formula for the sequence below. Then find a11
{-2, 5, 12, 19, …}
{-2, 5, 12, 19, …}
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