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40 Days of the Great Flood
Not sure about a gf, but GCF(6, 7) = 1.
gf
The term "1 20 14kt gf r" typically refers to a piece of jewelry that is made of 14-karat gold-filled material. The "1 20" indicates that the piece contains 1/20th of its weight in gold, meaning it has a substantial amount of gold compared to other gold-plated items. The "gf" stands for gold-filled, which means the gold is mechanically bonded to a base metal, making it more durable than gold plating. The "r" might denote a specific design or style, but its meaning can vary based on the context.
gf(5) = g(f(5)) = g(5+1) since f(x) = x+1 and then g(6) = 3*6 - 2 = 18 - 2 = 16