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7 people shake hands. Give a formula to represent the number of handshakes if n is the number of people

7 people shake hands. Give a formula to represent the number of handshakes if n is the number of people
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7 people shake hands. Give a formula to represent the number of handshakes if n is the number of people

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User Jlgrall
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the answer is n=7................
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User Fiarr
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