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The first term of an arithmetic sequence is -3 and the fifteenth term is 53. What is the common difference of the sequence? A) 14/13 B) 25/7 C) 4​
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The first term of an arithmetic sequence is -3 and the fifteenth term is 53. What is the common difference of the sequence?

A) 14/13
B) 25/7
C) 4​

User Gvo
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1 Answer

5 votes

Answer:

C) 4

Explanation:

The nth term of arithmetic sequence is
a_n=a_1+d(n-1)

So:


a_(15)=a_1+d(15-1)\\\\53=-3+14d\\\\56=14d\\\\d=(56)/(14)=4

User Keymusicman
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