SOLUTION: If the 6th term of an AP is -10 and 10th term is -26. Determine the 15th term of an AP.

Question 1108437: If the 6th term of an AP is -10 and 10th term is -26. Determine the 15th term of an AP.
Found 2 solutions by josgarithmetic, TeachMath:
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
Sixth term and tenth term are 4 differences apart.

General term, , although you do not really need to find this nor A, the first term.

-
-----mistake

-
General Term,

Fifteenth Term?

-

-

Should be, starting from n=10,
to n=15,
FOUR common differences;

Answer by TeachMath(96) (Show Source): You can put this solution on YOUR website!
correct answer: 15th term = - 46.
- 54 is WRONG!
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