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kvasek [131]
3 years ago
5

The recursive formula for an arithmetic sequence is an = an - 1 + d.

Mathematics
2 answers:
Annette [7]3 years ago
8 0
A) -5 should be your answer
LekaFEV [45]3 years ago
3 0
If an is a5
and
an-1 is a4

then using your recursive formula for an arithmetic sequence
an=an-1 +d
then
a5=a4+d

now, a4 =6 and common difference "d"  is d=-11
hence
a5=6 -11
6-11= -5


any questions?



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dem82 [27]

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Step-by-step explanation:

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Let the coordinates of B be (x, y)

Since, M is the midpoint of AB.

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1 =  \frac{ - 1 + x}{2},  \:  \:  \: 3 =  \frac{5 + y}{2}  \\  \\ 2 =  - 1 + x, \:  \:  \: 6 = 5 + y \\  \\ 2 + 1 = x, \:  \:  \: 6 - 5 = y \\  \\ 3 = x, \:  \:  \: 1 = y \\  \\ x = 3, \:  \:  \: y = 1 \\  \\ B = (3, \:  \: 1)

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