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15,−15,−45,−7515,-15,-45,-75 What is the common difference?

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Q. 15,−15,−45,−7515,-15,-45,-75 What is the common difference?
  1. Identify sequence difference: Identify the sequence and calculate the difference between the first two terms.\newlineCalculation: −15−15=−30-15 - 15 = -30
  2. Calculate first two terms: Calculate the difference between the second and third terms.\newlineCalculation: −45−(−15)=−30-45 - (-15) = -30
  3. Calculate second third terms: Calculate the difference between the third and fourth terms.\newlineCalculation: −75−(−45)=−30-75 - (-45) = -30

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