6.c)x²+1/x+1=0,5²+1/0,5+1=0,25+1/1,5=1,25/1,5=0,8(3)
d.x=11/2=1·2+1/2=3/2
x²+1/x+1=(3/2)²+1/(3/2+1)=(9/4+1)/3/2+1) aducem la acelasi numitor=13/4:5/2=13/4·2/5=
26/20 simplificam cu 2=13/10
la ex.7 dai valori lui x si y in fiecare caz si calculezi ca mai sus
exemplu pt.x=1 si y=1⇒3x+2y/2x-y=3·1+2·1/2·1-1=5/1=5
si asa faci si pentru restul
la ex.8 de exemplu daca x=2y⇒0,8x+1,2y/2x-y=(0,8·2y+1,2y)/(2·2y-y)=(1,6y+1,2y)/4y-y=
2,8y/3y simplificam cu y=2,8/3=0,93333....=0,9(3) s.a.m.d restul faci tu
ex.10
F(X)=(2x+1)/8-4x
F(0)=(2·0+1)/8-4·1=1/8=0,125
F(1)=(2·1+1)/8-4·1=3/4=0,75
cum 0,125 mai mic ca 0,75⇒F(0) mai mic decat F(1) s.a.m.d
sper sa te descurci
