Un = 3n + 2
U25 = 3(25) + 2 = 75 + 2 = 77
U27 = 3( 27) + 2 = 81 +2 = 83
U25 + U27
77 + 83 = 160 (b)
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Un = 3n + 2
U25 = 3(25) + 2 = 75 + 2 = 77
U27 = 3( 27) + 2 = 81 +2 = 83
U25 + U27
77 + 83 = 160 (b)