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com.neevia.http://www version trial Converter Personal Neevia by Created

 

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1. / * ( 0 ) ##

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) # [a, b] # f¢ (x) = 0 [a, b], )

* & * */ * + 2( # ! 1.

 

* # m < M, ++#( + * + f(a) = f(b) ' ' ( #0 ) x1 # # x2

" (# */ + # (a, b).

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, %#/ 16 2. , & 2 * ( 0 ) ##

" c Î (a, b) , %

 

 

 

 

 

f ' (c) =

f (b) - f (a)

.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b - a

 

 

 

 

 

. * +# $ %#

 

 

 

 

 

 

 

 

 

 

 

 

g (x) = f (x) - lx,

l =

f (b) - f (a)

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b - a

 

 

 

 

 

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3. g(a) = g(b), ) & + / */ / ' (* + '

 

 

 

 

 

 

 

 

 

 

g (a) = f (a) -

f (b) - f (a)

a =

f (a)b - f (a)a - f (b)a + f (a)a

=

f (a)b - f (b)a

,

 

 

 

 

 

 

 

b - a

b - a

 

 

b - a

g (b) = f (b) -

f (b) - f (a)

b =

f (b)b - f (b)a - f (b)b + f (a)b

=

- f (b)a + f (a)b

.

 

 

 

 

 

b - a

b - a

 

 

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) ( 0!+ 2.

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f (b) - f (a)

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f ' (c) = f (b) - f (a) . g ' (c) g (b) - g (a)

. * +# $ %#

 

 

h(x) = f (x) - lg (x),

l =

f (b) - f (a)

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g (b) - g (a)

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1.

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2.

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h(a) = f (a) -

f (b) - f (a)

g (a) =

f (a)g (b) - f (a)g (a) - f (b)g (a) + f (a)g (a)

=

 

 

 

 

 

g (b) - g (a)

 

g (b) - g (a)

= f (a)g (b) - f (b)g (a) , g (b) - g (a)

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h(b) = f (b) - f (b) - f (a) g (b) = f (b)g (b) - f (b)g (a) - f (b)g (b) + f (a)g (b) =

g (b) - g (a)

g (b) - g (a)

= - f (b)g (a) + f (a)g (b) g (b) - g (a)

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4. ( # '

( 6# !, #0+ * ! ( 0+ # +# , # / ( / 7 #/ 3 * ) !" # # 3 * ) 3 7#" $ %#', ( & 1$$#+ !' ( !* #/ ( $ %## # 6# * (* + (#$$ %# & #*)#* #/. ( /+ / */ +* 36# # # #+ * !, #+ (# 3!* ( * #2 # % # + " 0 ( ) ". ) * 0 ( )# ( 7 #/ 3 * ) !".

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1.%% # d- x0, , , x0;

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lim f ' (x) = l, x®x0 g ' (x)

"

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lim f (x) ,

x®x0 g (x)

l.

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limx® x0 f(x) = f(x0) = 0 # limx® x0 g(x) = g(x0) = 0.

( + , 3 ( ( ! $ %## f # g * # !+ ! # + ) x0.

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g(x) = g(x) - g(x0) = g¢ (c)(x - x0).

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f ' (c) = f (x) - f (x0 ) = f (x) g ' (c) g (x) - g (x0 ) g (x)

* # x® x0, 3 c® x0, 1 * 6 * + + *

#' ( + ' ) * # * ( & + * +,

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lim

f (x)

=

lim

f ' (c)

= lim

f ' (c)

= l.

 

 

 

x®x0 +0 g (x)

x®x0 +0 g ' (c)

c®x0 +0 g ' (c)

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lim

 

f (x)

= l.

 

 

 

x®x0 -0 g (x)

0 (+ " * ( #" + * + * (, )

 

 

 

 

lim

f (x)

= l.

 

x®x0 g (x)

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x®x0 x

x®0

x

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5. ( # ' "'

!+ ( ) +# , # / ( / 7 #/ 3 * ) 3 7#".

5. ! % # f g :

1.%% # d- x0, x0;

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3. g¢ (x) ¹ 0, 0 < |x - x0| < d,

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lim f ' (x) = l. x®x0 g ' (x)

"

lim f (x) ,

x®x0 g (x)

l.

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(1)

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1

 

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< d

1

 

f ' (x)

- l

< e,

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

0

 

 

 

 

 

 

g ' (x)

 

 

 

 

 

 

+ * +

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

f ' (x)

 

=

 

f ' (x)

- l + l

 

£

 

f ' (x)

- l

 

+

 

l

 

< e +

 

l

 

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g ' (x)

 

 

 

g ' (x)

 

 

 

 

 

 

 

g ' (x)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

. * x1 > x0, |x1 - x0| < d1. !3 ) x Î (x0, x1).

#*. 4. * %#/ +# , # / ( / 7 #/ 3 * ) 3 7#".

%## f # g (#$$ %# ! 0 [x, x1]. limx® x0f(x) = limx® x0g(x) = ¥, f(x) ¹ f(x1) # g(x) ¹ g(x1) # $# *# + x1 # # x, " (/6#"*/ ( * ) 3 #0 x0. 4 ( *)# 1 # * +#/ 2 +! ! # 0 *)

+!3 ( * ) & d1 > 0.

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