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HELP PLEASE !!!!! 1 . What is the value of the sum indicated by the expression ( the bottom is 2k + 2 )

HELP PLEASE !!!!! 1 . What is the value of the sum indicated by the expression ( the bottom is 2k + 2 )
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HELP PLEASE !!!!!

1 . What is the value of the sum indicated by the expression ( the bottom is 2k + 2 )

HELP PLEASE !!!!! 1 . What is the value of the sum indicated by the expression ( the-example-1
User Chathux
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\sum_(k=4)^8(2k+2)=2\cdot4+2+2\cdot5+2+2\cdot6+2+2\cdot7+2+2\cdot8+2\\ \sum_(k=4)^8(2k+2)=10+12+14+16+18\\ \sum_(k=4)^8(2k+2)=70
User Sski
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