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dana jest funkcja liniowa opisana wzorem .
a) oblicz wartosc wyrazenia:
b) oblicz dla jakich argumentow funkcja f przyjmuje wartosci nieujemne
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f(x) = [- p(2)/3 ] x + 4
zatem
f( [ p(2)/2] = [ - p(2)/3]*[ p(2)/2] + 4 = - 1/3 + 4 = 3 2/3
f(1) = [ - p(2)/3]*1 + 4 = - p(2)/3 + 4
a)
3* f[ p(2)/2] + 2 p(2) * f(1) = 3* ( 3 2/3) + 2 p(2)*[ - p(2)/3 + 4] =
= 3*(11/3) - 4/3 + 8 p(2) = 11 - 4/3 + 8 p(2) = 9 2/3 + 8 p(2)
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b)
f(x) = [ - p(2)/3] x + 4 > = 0
[ - p(2)/3 ] x > = -4
x < = - 4 *[ - 3/p(2)]
x <= 12/p(2)
x < = 6 p(2)
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p(2) - pierwiastek kwadratowy z 2
a)