1. Which explicit formula is equivalent to a1 = 7, an = an-1 + 3.2? %3D %3D O an = an-1+ (n- 1)3.2 O an = 7+ (n - 1)3.2 O an = 3.2 + (n- 1)7 %3D O am = 7(3.2)"-1

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