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Verified answer
Barisan Aritmetika3 + 3¾ + 4½ + 5¼ + ...
U1 = 3
b = ³/₄
U40 = a + (n - 1) b
= 3 + (40 - 1) ³/₄
= 3 + (39) ³/₄
= 3 + ¹¹⁷/₄
= ¹²/₄ + ¹¹⁷/₄
= ¹²⁹/₄
= 32 ¹/₄