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  3. 9. determine the sum of each series.a) 400 +420 +

9. Determine the sum of each series.a) 400 +420 + 440 + ... +620th= a...

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9. Determine the sum of each series.a) 400 +420 + 440 + ... +620th= a +(n-1)d620=400+ (n-1) 20220 =(n-1) 2011 = n-1n = 12;b) 3+6+ 12+ 24 +48 +...+1536

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Transcribed Image Text

9. Determine the sum of each series.a) 400 +420 + 440 + ... +620th= a +(n-1)d620=400+ (n-1) 20220 =(n-1) 2011 = n-1n = 12;b) 3+6+ 12+ 24 +48 +...+1536

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