Mathematics, 03.11.2021 03:10 autumnguidry1622
A) If the 5th term of an A. P. is double the 7th term, show that the sum of the 17 terms zero.
Answers: 3
= a₁ + (n - 1)d
= 
[ 2a₁ + (n - 1)d ] , substitute values
= 
( 2(- 8d) + 16d)Another question on Mathematics
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A) If the 5th term of an A. P. is double the 7th term, show that the sum of the 17 terms zero....
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