Question

seja a funçao f: R ⇒R, definida por
y=x²+2x-3. Calcule f (-3), f (-2), f
(-1), f (0), f (1), f (2)

Answer 1

y=x²+2x-3. Calcule

f (-3)=x²+2x-3=(-3)²+2(-3)-3=9-6-3=0
f (-2)=x²+2x-3=(-2)²+2(-2)-3=4-4-3= - 3
f(-1)=x²+2x-3=(-1)²+2(-1)-3=1-2-3= - 4
f (0)=x²+2x-3=(0)²+2(0)-3=0+0-3= - 3
f (1)=x²+2x-3=(1)²+2(1)-3=1+2-3= 0
f (2)=x²+2x-3=(2)²+2(2)-3=4+4-3= 5