If the 3rd term of an arithmetic sequence is 10 and the 8th term is 25. What is the common difference? Find 13th term and 40th term.
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Step-by-step explanation:
3rd term is 38
a+2d=38--------eq1
8th term is 23
a+7d=23-------eq1
solve eq(2-1)
a+7d-a-2d=23-38
5d=-15
d=15/5
d= -3
eq1=)a+2 (-3)=38
a=6=38
a-38+6
a=44
17th term is a+16d
44-48
=-4
17th term is
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