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2. x is negative.
2. x is negative.
3. alpha<math>\le 0</math> or beta <math>\le 0</math>
3. alpha<math>\le 0</math> or beta <math>\le 0</math>
<math>F(x,\alpha,\beta)</math> =<math>1-e^\frac{x}{\beta}^\alpha</math>
<math>F(x,\alpha,\beta)</math> =<math>1-e^-{(\frac{x}{\beta})}^\alpha</math>.
==Examples==
==Examples==
#=WEIBULL(202,60,81,TRUE) = 1
#=WEIBULL(202,60,81,TRUE) = 1