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Verified answer
DeRet Geometriac/(b + 2) = 1
U2 × U4 = U3²
ac = b²
b + 2 = b²
b² - b - 2 = 0
(b - 2)(b + 1) = 0
b = 2 atau b = -1
b > 0
Nilai b yg memenuhi :
b = 2