Question

f: R => R; f(x) =2x - 4
Calculati: f(-2) · f(-1) · f(1) · f(2) · .... f(10)

Answer 1

f(-2) * f(-1) * f(1) * f(2) * .... f(10)=?

f(-2)=2*(-2)-4=-4-4=-8f(-1)=2*(-1)-4=-2-4=-6
f(1)=2-4=-2
f(2)=4-4=0
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f(10)=20-4=16

f(-2) * f(-1) * f(1) * f(2) * .... f(10)=(-8) * (-6) * (-2) * 0 * ... *16= 0
Orice numar inmultit cu 0 da 0.

Answer 2

f(x)=2x-4
f(-2)=2 × (-2)-4=-8
f(-1)2 × (-1)-4=-6
f(1)=2 × 1 -4=-2
f(2)=2 × 2-4=0
f (-2) × f( -1) × f(1) × 0 × f(3) ×....×f(10)=0 deoarece orice numar inmultit cu 0 este egal cu 0