SOLUTION: First term is 1 Common difference is 4. Sum of the terms is 153. How many terms are in the series. Show method of calculation.
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Question 935982: First term is 1 Common difference is 4. Sum of the terms is 153. How many terms are in the series. Show method of calculation.
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!
, general term for the sequence.
, L is for LAST term in the sequence,
The formula for sum of a sequence of n terms.
Better, the expression is .
Your sum 153, you want to find n.
The first goal is to understand all that, leading to the equation just given. The rest is to just simplify that equation and solve for n.
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