In the arithmetic sequence {13, 6,-1,-8,...}, what is the common difference?
Enter your answer as a number, like this: 42

Question

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12-02-2021
Mathematics

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In the arithmetic sequence {13, 6,-1,-8,...}, what is the common difference?
Enter your answer as a number, like this: 42

Respuesta :

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Khasandra Khasandra · Answer 1 · 2021-02-12T17:30:13+01:00

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Answer = -7

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Known

a = 13

U2 = 6

U3 = -1

U4 = -8

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Question

d = ..?

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Way to do

#since it gives a lot of number, i will just pick one of the nth term, ill choose U2

Un = a + (n-1)d

U2 = 13 + (2-1)d

6 = 13 + d

6 - 13 = d

d = -7

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Note

• The formula of arithmetic sequence

Un = a + (n-1)d

n = nth term

a = first term

d = common difference

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In the arithmetic sequence {13, 6,-1,-8,...}, what is the common difference? Enter your answer as a number, like this: 42

Respuesta :

Answer = -7

Known

Question

Way to do

Note

Un = a + (n-1)d

Otras preguntas

In the arithmetic sequence {13, 6,-1,-8,...}, what is the common difference?
Enter your answer as a number, like this: 42