SOLUTION: Find the 6th and 15th term of the A.P whose first is 6 and common difference is 7

Question 1176510: Find the 6th and 15th term of the A.P whose first is 6 and common difference is 7
Found 2 solutions by MathLover1, Boreal:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
In General we could write an arithmetic sequence like this:
{ , , , , ... }

and formula for th term

where is the number of a term

if given and

th term will be

and th term will be

Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
an=a1+(n-1)d
a6=6+(5)(7)=41
a15=6+(14)(7)=104
6
13
20
27
34
41
ten more terms is a16=111
a15 is 111-7=104
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