Question

Prosze o zad 14 w pliku dam naj...

Answer 1

a)
x² ≤ 16
x² - 16 ≤ 0
(x+4)(x-4) ≤ 0 i x∈C
x∈{-4,-3,-2,-1,0,1,2,3,4}
b)
9-x² >0
(3+x)(3-x) > 0  i  x∈ C
x∈{-2,-1,0,1,2}
c)
x² - 4x <0
x(x-4) < 0 i x∈ C
x∈{1,2,3}
d)
16+x² ≤ 8x
x² - 8x +16 ≤ 0
(x-4)² ≤ 0
x-4=0
x=4