l x a b l = ax + b l x x l a b l = ax + b 5 cm cm 1 x l l = 0.5x 5cm cm 1 x l l = 0.25x 1.25 値 x 値 値 x

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1 l x a b l = ax + b l x x l a b l = ax + b 5 cm cm 1 x l l = 0.5x 5cm cm 1 x l l = 0.5x 1.5 値 x 値 値 x 値 長さ l 長さ cm 長さ l 長さ cm 1 1 1

2 5cm /99 cm 1 x l l = 5/99x 5/99 値 x 値 長さ l 長さ cm 3 3 x l a b c x y y = a log c x + b log c 10 x l a b l = a x + b (1) x l x l cm x l l =.5 x 1 1 = = = cm =.605 値 x 値 x 値 長さ l 長さ cm 4 1

3 10.5 cm 4 0.1cm cm x l l = (5/ 5) x 5 値 x 値 x 値 長さ l 長さ cm 5.1 (1) x 6 x y y = ax + b y = ax b y = ab x y = a log e x + b 1 y = 90x () y = 0.8x (3) y = x (4) 1 log a a y = a log e x + b = a log e 10 x + b = a (.30 ) x + b = a x + b A. 3

4 y (linear) 5000 Y (= y) 3 1 y (logarithmic) x (linear) x (linear) (a) (b) y (linear) 5000 Y (= y) 3 1 y (logarithmic) x (logarithmic) x (logarithmic) 0 1 X (= x) 0 1 X (= x) (c) (d) 6 y = 000 log e x (5) x y 10 X Y X = x y x = 10 X 4

5 y = 10 Y X Y x y y = 0 log x y = 90 x y = 0.8 x y = x y (linear) y = 000 log e x x (linear) y 8 () y = 10 Y y = 90x Y = 90x (90x + 500) 90 + (x + 500/90) Y (x ) Y x 8-7 5

6 Y (= y) y (logarithmic) y = 90 x y = 0.8 x y = x y = 000 log e x x (linear) 8 (3) y = 10 Y y = 0.8x 10 Y = 0.8x Y = x Y x Y x 8-7 (4) y = 10 Y y = x 10 Y = x Y = x Y x Y x 8 10 Y 1 x 100 Y (= y) x 100 Y (= y) a b y = ab x 10 Y = ab x a + x b 6

7 b a a b (5) y = 10 Y y = 000 log e x Y = 000 log e x Y = 3 + (log e x + 1/) Y (log e x ) x y = 90 x y = 0.8 x y = x y = 000 log e x y (linear) x (logarithmic) 0 1 X (= x) 9 () x = 10 X y = 90x y = X y 10 X y X 9-7 7

8 (3) x = 10 X y = 0.8x y = 0.8(10 X ) y = 0.8(10 ) X y = X y X 9-7 (4) x = 10 X y = x y = X y = 0.9 ( ) X y X y X 9-7 (5) x = 10 X y = 000 log e x y = 000 log e 10 X y = 000X log e y X y 4606X y X 9 a b y = a log e x + b y = a log e 10 X + b y = (log e 10)aX + b (log e 10)a b a b 8

9 x y y = 90 x y = 0.8 x Y (= y) 3 1 y (logarithmic) y = x y = 000 log e x x (logarithmic) 0 1 X (= x) 10 () x = 10 X y = 10 Y y = 100x y = 90x Y = X (90 10 X + 500) (90 10 X + 500) 10 (3) x = 10 X y = 10 Y y = 0.8x 10 Y = 0.8 (10 X ) 10 {0.8 (10 X ) } (10 X ) Y X Y X a b 9

10 y = ax b 10 Y = a(10 X ) b 10 Y = a(10 X ) b a + 10 b X a + bx b a a b (4) x = 10 X y = 10 Y y = x 10 Y = X ( X ) X 1.1 Y X Y X - 7 (5) x = 10 X y = 10 Y y = 000 log e x y = 000 log e x Y = 000 log e 10 X Y = 000X log e (000X log e ) Y (4605X ) Y (X ) Y X y = ax + b 7 10

11 8 y = ab x 9 y = a log e x + b 10 y = ax b 1 X Y X 1 Y X = 0 Y b = a = 0.1 a = y = 0.8x 1 - y = ax + b a b - y = ab x b a - y = a log e x + b (log e 10)a b - y = ax b b a y = x (4) x 10 (6) y 000 (7) (8) (9) y = (x 10) (6) y = x (7) y = x (8) y = 0.9 x (9) 11

12 (6) y = 10 Y 10 y = (x 10) 10 Y = (x 10) (x 10) (x 10) 1.1 Y = x Y x (b) 1 (7) y = 10 Y 10 y = x Y = x Y = x ( x + 000) 11(b) x x 0 (8) y = 10 Y 10 y = x 10 Y = x (3 1.1 x ) 3 + x 1.1 Y x (b) (9) y = 10 Y 10 y = 0.9 x 10 Y = 0.9 x (0.9 x ) y = x 10 = x 1.1 ( 10) x x 1

13 0.9 + x Y x (b) x y Y axis (linear) y = x y = x -10 y = x +000 y = x y = 0.9 x Y axis (logarithmic) y = x y = x -10 y = x +000 y = x y = 0.9 x X axis (linear) X axis (linear) (a) (b) y = 0.8x (3) x 10 (10) y 0 (11) (1) (13) y = 0.8(x 10) (10) y = 0.8x (11) y = 1.3x (1) y = 0.8x 3 (13) (10) x = 10 X y = 10 Y y = 0.8(x 10) 13

14 10 Y = 0.8(10 X 10) 10 {0.8(10 X 10) } Y = (10 X 10) Y X 1(b) X 3 x X X (11) x = 10 X y = 10 Y y = 0.8x Y = 0.8(10 X ) {0.8(10 X ) + 000} {0.8(10 X ) + 000} Y X 1(b) (10) X 3 y X X (1) x = 10 X y = 10 Y y = 1.3x 10 Y = 1.3(10 X ) 10 {1.3(10 X ) } Y = X Y X Y X 1(b) 1 x 1(b) (13) x = 10 X y = 10 Y y = 0.8x 3 10 Y = 0.8(10 X ) 3 10 {0.8(10 X ) 3 } Y = 3X Y 3X

15 Y X 1(b) 1 x 1(b) x y Y axis (linear) y = 0.8x y = 0.8(x - 10) y = 0.8x y = 1.3x y = 0.8x 3 Y axis (logarithmic) y = 0.8x y = 0.8(x - 10) y = 0.8x y = 1.3x y = 0.8x X axis (linear) X axis (logarithmic) (a) (b) 1 - A A.1 log log log b c c b c = b a c b log b c = log b b a = a a = 10 = = = 10 1 = = 10 3 = 3 15

16 0.1 = 10 1 = 1 1 = 10 0 = 0 log log 8 = log 3 = 3 log 64 = log 6 = 6 log 1 = log 0 = 0 1 log 0.5 = log = log 1 = 1 1 log 0.5 = log 4 = log 1 = log = A. log A..1 log log a b c = c log a b b = a n n log a b = log a a n = n log a b c = log a (a n ) c = log a a nc = nc log a b = n = c log a b log 8 = log 3 = 3 log 16

17 A.. log log a bc = log a b + log a c a B = b a C = c A B bc = a B a C bc = a B+C a log a bc = log a a B+C log a bc = B + C B = log a b C = log a c log a bc = log a b + log a c A..3 a b log b a d = a h (14) a log log a d = log a a h log a d = h (14) d = a log a d b log log b d = log b a log a d log b d = log a d log b a log b a a b A.3 e e a e d dx ax = a x (15) 17

18 (15) d a x+h a x a h 1 = lim = a dx ax x lim h 0 h h 0 h (15) (16) (16) a lim k 0 a h 1 lim = 1 h 0 h (16) h lim h 0 a h 1 = 1 h = log a(1 + k) h 0 k 0 log a h = 1 + k log a (1 + k) = 1 k lim log a (1 + k) k 1 = 1 k 0 lim(1 + k) k 1 = a k 0 (17) (17) a e e e = lim(1 + k) k 1 k 0 k = 1/m m ( e = lim m (18) m m) m (1 + 1/m) m 13 m (1 + 1 / m ) m m 13 e (18) a n = (1 + 1/n) n (18) a n = ( a + 1 n) n 18

19 = n ( ) 1 nc p p=0 p=0 n p n ( ) n! 1 = p!(n p)! n p = 1 + n 1 1! n + n(n 1)! C n! (n p)! 1 n(n 1) {n (p 1)} 1 n(n 1) p n p! n n! = n 1! n + 1 n(n 1) n(n 1) {n (p 1)} n(n 1) 1! n p! n p n! n n = n ! n! = ! ( 1 0 n n 0 n n n p! + 1 n (n 1) n (n ) n (n 1) n! n n n n ) + 1 ( 1 0 ) ( 1 1 ) + + 1! n n p! + 1 n! n 0 n 1 n (p 1) + n n n ( 1 0 ) ( 1 1 ) ( 1 n ) ( 1 n 1 ) n n n n ( 1 0 ) ( 1 1 ) ( 1 p 1 n n n n n ) + (19) (19) a n n a n a n (19) 1/1! 1/! 1/p! 1/n! (1 0/n) (1 0/n)(1 1/n) (1 0/n)(1 1/n) {1 (p 1)/n} (1 0/n)(1 1/n) {1 (n )/n}{1 (n 1)/n} {1 (p 1)/n} /1! 1/! 1/p! 1/n! a n 1/1! 1/! 1/p! 1/n! a n ! + 1! n! (0) 3! = 3 1 = 3 > = 4! = = 4 3 > = 3 p! = p(p 1)(p ) 3 > p 1 (0) a n ( ) n 1 n 1 1 = { ( ) n } 1 = = 3 1 n 1 < 3 a n a n (18) e 19

20 A.4 + = = ( = 1 + ) 100 ( = 1 + ) 100 = = % n n = n = 1.01 log n = log 1.01 n log [1] 0

21 [1],,,

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