Mister Exam

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Identical expressions
(x/ four - one)*exp(-x/ two) = zero
(x divide by 4 minus 1) multiply by exponent of ( minus x divide by 2) equally 0
(x divide by four minus one) multiply by exponent of ( minus x divide by two) equally zero
(x/4 - 1)exp(-x/2) = 0
x/4 - 1exp-x/2 = 0
(x divide by 4 - 1)*exp(-x divide by 2) = 0
Similar expressions
(x/4 + 1)*exp(-x/2) = 0
(x/4 - 1)*exp(x/2) = 0

(x/4 - 1)*exp(-x/2) = 0 equation