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D( P )
P = 0
P = 0
P = 0
P in (-oo:0) U (0:+oo)
P+150 = 10*(1000/P) // - 10*(1000/P)
P-(10*(1000/P))+150 = 0
P-10000*P^-1+150 = 0
1*P^1-10000*P^-1+150*P^0 = 0
(1*P^2+150*P^1-10000*P^0)/(P^1) = 0 // * P^2
P^1*(1*P^2+150*P^1-10000*P^0) = 0
P^1
P^2+150*P-10000 = 0
P^2+150*P-10000 = 0
DELTA = 150^2-(-10000*1*4)
DELTA = 62500
DELTA > 0
P = (62500^(1/2)-150)/(1*2) or P = (-62500^(1/2)-150)/(1*2)
P = 50 or P = -200
P in { -200, 50}
P in { -200, 50 }
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