(@ ) 005 4 36 8,,84 0 0 3 () (36 ) ( 36. 3 ) 7.3 6.5 08 08 008 008 a b ab > 0 a > b a b> 0 b 0 a x a + b> 0 3 005 3355.55 3 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8
(@ ) 3.3 0 3.4 0 3 8 3.4 0 3355.55 0 4 E F EF F F = = FE = F = F 5 E O E F O O O O O O O O O EFO E F 6 8cm 3cm 5cm cm 3cm 5cm cm 7 5% 7 8 8 x + 3 x = x 4 x + x 8 0 + 4 9 3 5 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8
(@ ) 4 3 5. 0.9 x y 0.9x =.y y x = 4 0.9x =.y x y = 4.x = 0.9y x y = 4.x = 0.9y y x = 4 0 O O 3 O =, = y 3 3 3 3 3 3 3 O x E F F E O O = O 5 3 5 3 O F E 400 300 00 3.5.8.9 ( ) 0 8 0 6 0 5 00 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 3 8 3
(@ ) 005 ( 84 ). 8. ( 5 5 3 45 ( ) ( ), ( ).) http://czsx.xicp.net; E-mail: shenyufu086@sina.com 4 8 4
(@ ) y 3 O x 4( ) y = x 5 k y = ( k 0) x P a, 3a ( ) ( ) 3, 5( ) 3 0 40 0 6000 40 0000 3 % 70 ( ), 0% (8089 ), 7079 80 (80 ), 36% 9000 8089 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 5 8 5
(@ ) 6 E E M N P M E P N 7 4 4 7 69.. 0.5% 6.7% http://czsx.xicp.net; E-mail: shenyufu086@sina.com 6 8 6
8( 8 ) (@ ) 0.9% 5.8% 3.% 6.7% 630 4 3.0% 7.8% 5 5.4% 8.8% 6.3% 9.4% 7 33.5% 9.4% 3 8 30.3% 9.0% 9 7.8% 9.0% 0 3.0% 9.9%.5% 9.0% 0.6% 8.5% http://czsx.xicp.net; E-mail: shenyufu086@sina.com 7 8 7
9.( 8 ) (@ ) = 4 E E F F G E G F H G G H H E F 0.( 9 ) 4 78 8 8 4 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8 8 8
(@ ).( 0 ( ) ( ), ( ) ) = = 900 = = 700 N, E E E = 500 N 800 l l a b c d a b c d () l http://czsx.xicp.net; E-mail: shenyufu086@sina.com 9 8 9
(@ ).( 0 ) 0 76 0 6 4 x y x x 0, y x 080 3. ( ),, O E, http://czsx.xicp.net; E-mail: shenyufu086@sina.com 0 8 0
(@ ) E O F EFF () EF FE () = 6, E = 3, EF (3) F E, E 4( ) y y = ax + bx+ cx y, x = (3,0), (0, 3) O y = ax + bx+ c P P P 3 x M N MN x http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8
(@ ) 005 () :( 36 3 ) 3 4 5 6 7 8 9 0 5 5 3 45 3.. http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8
(@ ) 3 4 4() y = () x 5 5() 50000 () 68% π 3 6 004 6 4 76 7 69 8. 6 630 = = 5.5 () 3%630=8.9. 9%630=56.7.... 3 3%630=8.9....4 8.9%630=56.07.... 5 (3) 78,,, 78,, 8 9. 6 :() O E,E = = 4.. O = 4 3 8 3..4 (), F F = 30 G E E EG GH = 90 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 3 8 3
(@ ) H = F + GH = 0 8 0. 9 : x, y. x 4y= 78...() : 4 x 8( y ) < 8...()..5 () (), 4 78 + 4y 8( y ) < 8 :9.5< y 0. 5 y 0, x 58 : 58, 0...9. 0 N H H F G N H F G G H F G 3 E F N E = E = 700 500 = 00 E = + E =500 E FE F E = E E F = = 500 900 = 300 5 E 500 HE FE F E = H E E F 00 300 H = = = 70 E 500 E G E = G 900 700 G = = = 00 E 500 6..9 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 4 8 4
(@ ) 70800=576000 300800=40000 00800=86000.........0 E = H F G a + c = b + d.. O OO O l OO O O OO = + = b + d OO = + = a + c a + c = b + d..4 O... 5 l c = b + d l c a = b + d l c a = d l a c = b d l a c = b l a c = b + d l a = b + d l a + c = b + d..0 ( 5 ) ( 0 ) 6 3 x y [ 0 + ( x ) ][ 76 4( ) ] y = x y = 8x + 8x + 640.7 080 8x + 8x + 640 = 080 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 5 8 5
(@ ) x =, x 5 = 5 080.0 3( 0 ) E O EF = E O E = E EF = E E E=E. E = EF EF = FE EF FE 3 EF FE E EF = EF E EF = E E = ( + E) E = 7 EF = 3 3.6 3 = E E = E E = E + E E + E + E =80 E + E =80 FE + E =80 FE = E 0 F E FE = E FE = EF E =E E 4 (0, 3) y = ax + bx + c c = 3 E O y O F c = 3 (3,0) y = ax + bx + c http://czsx.xicp.net; E-mail: shenyufu086@sina.com 6 8 6 O N x
(@ ) 9 a + 3b + c = 0.() x = b a = () a = b = y = x x 3 4 P (0, 3) (,0) 3 y = 3x x = P (, 6) 7 3 M ( x, y) N ( x, y) r x x r.() = x = x + x.() = x = r.(3) + ( Nr+, y) y = x x 3 y = ( r + ) ( r + ) 3.(4) y = r 4 0 r=y y > 0 r r 4 = 0 + 7 r = r = 7 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 7 8 7
y < 0 r + r 4 = 0 (@ ) + 7 r = r = 7 + 7 + 7 3 http://czsx.xicp.net; E-mail: shenyufu086@sina.com 8 8 8