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gulaghasi [49]
3 years ago
14

Write an explicit formula fo the sequence 7,2,-3,-8,-13.... Then find the 14th term

Mathematics
1 answer:
MrRa [10]3 years ago
6 0

Answer:

The 14th term is -58

Step-by-step explanation:

The formula for an arithmetic sequence is

an = a1+d(n-1)

where a1 is the first term

d is the common difference and

n is the term number

a1 = 7

d = 2-7 = -5

Check -3-2 = -5   so d = -5

an = 7 -5(n-1)

We want the 14th term

a14 = 7 -5(14-1)

a14 = 7 -5(13)

a14 = 7 -65

a14 = -58

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