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F = 1,44 / ((R1 + 2R2) × C) = 300 = 1,44 / ((10000 + 2R16) × 0,0000001)

(10000 + 2R16) × 0,0000001 = 1,44 / 300

(10000 + 2R16) × 0,0000001 = 0,0048

10000 + 2R16 = 0,0048 / 0,0000001

10000 + 2R16 = 48000

2R16 = 38000

R16 = 19000 Ом = 19 кОм