Question

Aflati punctele de intersectie in mod analitic ale functiilor:
f(x)=4x²;g(x)=x+3.
dau coroana.va rog e urgeeent.

Answer 1

au acelasi y, deci
f(x) =g(x)

4x²=x+3
4x²-x-3=0
x=(1+-√(1+48))/(2*4)
x1=(1-7)/8=-3/4
x2=(1+7)/8=1
y1= 4 *(9/16)=9/4 sau y1=-3/4+3=9/4 deci bine calculat
y2=4*1²=4 sau y2=1+3=4 deci bine calculat
 punctele de intersectioe sunt A ( -3/4;9/4) si B(1;4)