Odpowiedzi

2009-11-01T14:29:20+01:00
Odp. B

-2(x - 5)(x + 1) ≥ 0 |:(-2)
(x - 5)(x + 1) ≤ 0
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2009-11-01T14:38:11+01:00
A.-2(x+5)(x+1)≥0
x=-5 v x=-1
x∈<-5,-1>
b.-2(x-5)(x+1)≥0
x=5 v x=-1
x∈<-1,5)
c.2(x-5)(x>1)≤0
x=5 v x=1
x∈<1,5>
d.-2(x-5)(x+1)>0
x=5 v x=-1
x∈<-1,5>
zatem odpB
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