Dla jakich argumentów dana funkcja przyjmuje wartości ujemne? A) y=8x-3 B) y=ax+b
a)
y = 8x - 3
y < 0 <=> 8 x - 3 < 0
8 x < 3
x < 3/8
========
b)
y = a x + b
y < 0 <=> a x + b < 0
a x < - b
x < - b/a
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a)
y = 8x - 3
y < 0 <=> 8 x - 3 < 0
8 x < 3
x < 3/8
========
b)
y = a x + b
y < 0 <=> a x + b < 0
a x < - b
x < - b/a
=============