sabrinabowers1309 sabrinabowers1309

20-01-2018
Mathematics

contestada

Express the sum 7 + 14 + 21 + 28 + . . . + 105 using sigma notation.

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Niklot242 Niklot242

20-01-2018

7+14+21+28+...+105=1*7+2*7+3*7+4*7+...+15*7

15
∑7*n=7*1+7*2+7*3+7*4+...+15*7=7+14+21+28+...+105
n=1

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