proszę o rozpisanie wzoru jak go przekształcić z 1/f = 1/x + 1/y na y = fx/(x - f)
1/y = 1/f - 1/x
1/y = x/fx - f/fx
1/y = (x-f) / fx
fx = y (x-f) / : (x-f)
y = fx/(x-f)
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1/y = 1/f - 1/x
1/y = x/fx - f/fx
1/y = (x-f) / fx
fx = y (x-f) / : (x-f)
y = fx/(x-f)