.
:
F(x, a1, a2,..., ak) = 0 | (3.1) |
F - ;
x , ;
a1, a2,..., ak F.
(3.1) - ( ) x, (3.1) . x (3.1).
, ..
x = f(a1, a2,..., ak),
x a1, a2,..., ak, ,
ax2 + bx + c = 0
:
.
( ), .
A B (A<B), (3.1), .. , F (x) (. .3.2): sign F (A) ¹ sign F (B).
, , :
1) [ A, B ]:
; | (3.2) |
2) - F (P) sign F (P);
3) (3.1) [ A, B ], F (x) . [ A, P ], B P; [ P, B ], A P. [ A, B ], , , .. , .
1,2,3 . , [ A, B ] , , ..
B - A < | (3.3) |
.
, F (x) , .. " ", . " " 1 , .. F(P) | < 1 .
.3.2.
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