, %#/ 30 2. .& 7 * #3 #2 #/ $ %## # /%# ! & ) + ' * #
( * (, ) j (x0) = 0 # j (x1) = 0 #
R1(x) = j (x) + K(x - x0)(x - x1).
%#/ j , # $ %#/ f, (+ 2(! (#$$ %# 0 [x0, x1]. - $# *# #0+ x¢ Î (x0, x1) #
3, ) 3! +! # * * +# j (x¢) = 0, + *# + * +
f (x¢)- L (x¢) K = (x¢ - x0 )(x¢1 - x1 ) .
. # +!3 )#* K $ %#/ j 3 6 */ + + ) " x0, x¢ # x1.
#*. 4. * %#/ ( 0 * + ! & 7 |
* # #3 #2 #/ $ %## # /%# ! & ) |
+ ' * # |
. / '( */ ) # x1 Î (x0, x¢) # x2 Î (x¢, x1) #, ) |
j ¢(x1) = 0 |
# j ¢(x2) = 0. |
1 0 # # / $ %## j ¢ 0 [x1, x2], * & * ' '( */ ) x Î (x1, x2) /, )
j ¢¢(x) = 0.
L¢¢1(x) 2( * + 3 6 */ + +* ' )#* + ' *#, ) L1 /+ / */ # ' ' $ %# '. # #
+!)#* #/ # " (#, ) [(x - x0)(x - x1)]¢¢ = 2. ( + , * +# j ¢¢(x) = 0 + *# + #
0 = j ¢¢(x) = f ¢¢(x) - 2K,
#0 & +#(#, )
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