f(x)= x^2+2x-3
berem proizvodnyy
f'(x)=2x+2
2x+2>0
x>-1
2x+2<0
x<-1
Oblast' zna4enii funkcii (-beskone4nost:+beskone4nost')
<span>8,4х+3-5(7,2х+0,3) = 8,4х+3 -36х -1,5= -27,6х +1,5</span>
<span>при х = 2/3</span>
<span>-27,6 х 2/3 +1,5 = -27 6/10 х 2/3 + 1 5/10= - 27 3/5 х 2/3 +1 1/2= -138/5 х 2/3 +3/2= -92/5 +3/2 = (-184 +15)/10 = -169/10= -16,9</span>