Math, asked by danielle50, 7 months ago

3. Find the sum of the first 15 terms of the arithmetic sequence
17, 12, 7, 2

Answers

Answered by kundanconcepts800

0

Step-by-step explanation:

a= 2, d= 5

S = n/2[ 2a+(n-1)d]

= 15/2 [2×2+ (15-1)]

= 15×9 = 135

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