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[" EXERCISE "5.1],[" Choose the correct ...

[" EXERCISE "5.1],[" Choose the correct answer from the given four options: "],[" 1.In an "AP" ,if "d=-4,n=7,a_(n)=4," then "a" is "],[[" (A) "6," (B) "7," (C) "20," (D) "28]]

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