SOLUTION: Use the partial sum formula to find the partial sum of the given arithmetic sequence. ( Sn = n/2 ( a1 + an) )
Find the sum of the first four terms of the arithmetic sequence:
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Find the sum of the first four terms of the arithmetic sequence:
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Question 1181059: Use the partial sum formula to find the partial sum of the given arithmetic sequence. ( Sn = n/2 ( a1 + an) )
Find the sum of the first four terms of the arithmetic sequence: 7, 15, 23, . . . .
a. 60
b. 45
c. 152
d. 76 Found 2 solutions by MathLover1, MathTherapy:Answer by MathLover1(20850) (Show Source):
You can put this solution on YOUR website!
Find the sum of the first four terms of the arithmetic sequence: , , , . . . .
first term
common difference
fourth term
You can put this solution on YOUR website!
Use the partial sum formula to find the partial sum of the given arithmetic sequence. ( Sn = n/2 ( a1 + an) )
Find the sum of the first four terms of the arithmetic sequence: 7, 15, 23, . . . .
a. 60
b. 45
c. 152
d. 76
You don't have to find the 4th term as that woman did. But, even if you wanted to, just add 8 to the 3rd term 23,
to get the 4th term, 31. Is there any RIDICULOUS and UNNECESSARY calculation this woman has NEVER done?
Using what was provided, the formula, becomes:
Sum of 1st four terms or
