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diamong [38]
4 years ago
5

The first term of an arithmetic sequence is -5, and the tenth term is 13. Find the common difference.

Mathematics
1 answer:
zzz [600]4 years ago
6 0
Hello,

u_{1} =-5\\
 u_{2} =-5+d\\
 u_{3} =-5+2d\\
 u_{4} =-5+3d\\
...\\
 u_{10} =-5+9d=13\\
==\ \textgreater \  9d=18 \\
==\ \textgreater \  d=2


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