Question: 7i = ? An - 9 i=1 Choose 1 answer: 7i 7i A Tit + i 5 3 7i 7i 7i B 5 Tit- 3


7i = ? An - 9 i=1 Choose 1 answer: 7i 7i A Tit + i 5 3 7i 7i 7i B 5 Tit- 3 14 21 28 C An - 9 An - 9 An - 9 + An - C 14 21 An - 9 An - 9 + An - 9
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