let an=n+cosn(pie ) n=1,2,3be the ninth term sequence thene w/c of the following is true Athe fifth term is 6 B the10nthe term is 9 C a^7+b^8is 15 D a^7+a^6=1

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# Let an=n+cosn(pie ) n=1,2,3be the ninth term sequence thene w/c of the following is true Athe fifth term is 6

let an=n+cosn(pie ) n=1,2,3be the ninth term sequence thene w/c of the following is true Athe fifth term is 6 B the10nthe term is 9 C a^7+b^8is 15 D a^7+a^6=1