SOLUTION: use partial sum formulas and the information provided to find the sum :
1 - 4 + 16 - 64 .... n = 9
20 + 27 + 34 + 41 .... n = 16
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-> SOLUTION: use partial sum formulas and the information provided to find the sum :
1 - 4 + 16 - 64 .... n = 9
20 + 27 + 34 + 41 .... n = 16
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Question 616826: use partial sum formulas and the information provided to find the sum :
1 - 4 + 16 - 64 .... n = 9
20 + 27 + 34 + 41 .... n = 16 Answer by ewatrrr(24785) (Show Source):
Hi,
use partial sum formulas and the information provided to find the sum :
1 - 4 + 16 - 64 .... n = 9 Geometric = 1 and r = -4
20 + 27 + 34 + 41 .... n = 16 Arithmetic = 20 and d = 7
