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whatevs

  • 4 years ago

What is the sum of a 30–term arithmetic sequence where the first term is 74 and the last term is –100? –468 –390 –416 –442

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  1. ghass1978
    • 4 years ago
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    Sn=n(a1+an)/2=30(74-100)/2=-390

  2. lilg132
    • 4 years ago
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    -390

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