anonymous
  • anonymous
The first term of an arithmetic sequence is 12, the seventh term is 36 and the last term is 144. Find the common difference. I am not sure how to do this, please help!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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welshfella
  • welshfella
fist term = a1 7th term is a1 + 6d where d = common difference so to find d you plug in 12 and 36: 36 = 12 + 6d solve for d
welshfella
  • welshfella
any questions?
anonymous
  • anonymous
Ok! No, that explained it perfectly, thank you very much!

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welshfella
  • welshfella
yw

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