Odpowiedzi

Najlepsza Odpowiedź!
2010-02-10T18:50:07+01:00
Y = f(x) = 2x + 4
x= 0, y = 2*0 + 4 = 4
A = (0; 4)
y = 0
0 = 2x + 4 ----> x = -2
B = (-2; 0 )
O = (0; 0)
I AO I = h = 4 - 0 = 4
I BC I = a
C = (x1 ; 0)
Mamy
P = [a*h ]/2
2 P = a*h ----> a = [2 P]/ h = [2*10]/4 = 20/4 = 5
I BC I = x1 - (-2) = x1 + 2
czyli
x1 + 2 = a = 5
x1 = 5 - 2 = 3
Odp. C = ( 3, 0 )
1 1 1