数学Ⅲ立体アプローチ.pdf

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1 Ⅲ Ⅲ DOLOR SET AMET

2

3 . cos x cosx = cos x cosx = (cosx + )(cosx ) = cosx = cosx = 4. x cos x cosx =. x y = cosx y = cosx. x =,x = ( y = cosx y = cosx. x V y = cosx y = sinx ( cosx cosx ) d x = [ sin x sinx ] = 4 (

4 .. x. x

5 V V V V = (cosx) d x + = [x + sinx ] pi ( cosx) d x = ( + cosx ) d x + + [x + 4 sin4x ] = ( + ) ( + cos4x ) d x V = 4 (cosx) d x + = [x + 4 sin4x ] 4 ( cosx) d x = + [x + sinx ] 4 ( + cos4x)d x + = ( 5 4 ) ( + cosx)d x = ( ( + ) ) = 8 4

6 a >,b >,A(a,,), B(,b,) l AB = OB OA = (,b,) (a,,) = ( a, b,) z B a, b x yz A(a,,), B(,b,) l l z y P.P(x, y, z) x, y, z z = z = A l P(x, y, z) AP AB X AP = AB OP OA = AB 5

7 x a a y ( z) ( ) = b ( ) z = S() S() = HP = {a a + (a + b ) } x = a a y = b z = l P(x, y, z) H(,,) z V = S()d = {a a + (a + b ) }d = [ a a + (a + b ) ] = (a + b ) z = z B. y H P A HP = x + y = (a a) + (b) X x + y = (a a) + (b) = a a + (a + b ) z = x + y = a a z + (a + b )z 6

8 . 7

9 . P ABC Q AB R P x yz A(,,), B(,,), C(,,) ABC D D P, D AB Q. P Q. D z =. D z = Q P (,, ),Q (,, ). D y = x P z D 4. D z z R RQ P R R(x, y, z) P(,, ) x + =, y + =, z + = Q(,,) 8

10 R ( 6, 6, ) D z = z ( x ) + ( y ) + ( z ) 6 x + y + z (x + y + z) + 6, x + y + z = D x + y + z =,x + y + z. D PQ = ( ) + ( ) + ( ) = 6 D P 6 ABC;x + y + z = z = x + y =, x + y X,Y XY M X R H M P Y y H Y M X x Q HX = H(,,) x + y = HM =, 9

11 D z z = S XY HX = HM + MX MX = HX HM = ( ) MX = S = (HX HM ) = ( ( ) ) = ( ) V 4. D z. z.4

12 ..5

13 4. OT = (,, ),α = (,,) T (,, ) α ( x ) + ( y ) + ( z ) = x yz (,,) l. l (,, ) l x y. y x( x) x y D l D x + y + z = x + y + z = xy ; x + y =, z =

14 . x y y = x + -,y x y.6 D D; y x( x) y = x + y y = x( x) (,) y = x x y = x [ x ] x= =.7 y = x + y = (x ) +, y = x + y

15 D x + y =, z = Q,R QR l x + y + z = S = (TQ TR ).9.8 4

16 OT = (,, ) u = OT = ( ) + ( ) + ( ) = ; u; V = SduQ, R Q y = x + x y = Q(,,) R y = x + y = x( x) x ; v; v = = v d = vdv V = V = 4 (( + v )v 4v ) vdvv = ( )!! 5! = 5 4v (v ) dv. R(, +,) TQ = ( ) + ( ) + ( ) TR = ( + ) + ( + ) + ( ) TQ TR = ( ) 4( ) u = du = d V = Sdu = (( ) 4( ) ) d V = (( ) 4( ) ) d v = 5

17

18 . x = ab a + c, y = a + c, z = ab a + c. a, b, c a, b, c P(x, y, z) K K y =. K a, b, c (a, b, c) (x, y, z) x = ab a + c, y = a + c, z = x = ab a + c, y = a + c, z = ab a + c ab a + c = a + c = a + c ( a, c ) 7

19 a, b a = c +,. a = c + Type [Type]; 4. a = c + Type c Sep c [Type]; c Sep (x, z) c c 8

20 x = ab a + c, z = ab, = a + c (x, z) a + c OP = ( x z) [Type]; c c c P x QP Q. QP OP = ( x z) = b a + c (c a) = b ( c a ) = b c c OQ = c c, OP = b OQ, b P OQ b OQ = c c = ( x z ) Q(x, z ) x + z = c + c = Q(x, z ) xz x + z = 9

21 A (, ),B (, ),C (, ),D (, ).4 QP OAB S S = ( ) = OCD S S = 4S = ( ) ABCD S S = S S = ( ) [Type]; 4 c x E (, ),F (, 4 ),G (, 4 ),H ( 4, 4 ) OEF T T = ( ) 4 OGH T = 4 T = 4T = EQGH T (4 ) T = T T = ( 4 )

22 . V V = ( )d ( ) d = 5 log 9 log..5

23 . z = x + y + z x y x + y + x y x y (x y) ( ) 7 x yz x, y, z x + y + z x y. z = x y S(). (x y) ( ) (x y )(x y + ) TypeⅠ x y x y + y x y x + y x y TypeⅡ x y x y + y x y x + y x + y

24 .6 z =. ( ) d = ( ) d d ( ) d = [ ] = 5 d = 4 5 ( S() = ( ) =

25 . 4

26 h h V..8 h.6 y = x ( x ) y = h V V dv dv d d = h y = h h = x. h dh h d. T y x x 5

27 h h V = x dy = V = h dv d ydy = [ y ] = h dv d = h = h dh d y = x x = h = h =, = h = + C C = h = + h = h = h = h dh d T = dh d = h.7. h h dh d = h dh d d = d h = + C C 6

28 4. θ = 4 ABE r = AB = h h(h > ) θ θ = 4 D ABE h ABE r ( h + h + h). h. θ = 4. θ = 8 A O F C E h rh( + ) = r = h = h( + ) B h(h ) = h > h = + 7

29 . V.8 Lorem Ipsum dolor ame, conseceur V = 4 r = U h U = h W W + = h h = + W = + θ = 4 yz x = ( ) x = x + y = y = ± z = x + + 8

30 S(). S() = ( + ) ( ) ( + ) d = d + d d d = d p() = p( ) = p() p() d = = + = an θ = cosθ + cosθ θ = 4 an 8 = = ( ) an 8 = θ = 8 W = OAH = 8 AB = h = + 9

31 D + z = ( + )x z = ( + )x ( + ) C S() S() = ( + ) ( ) A O F.9 H B ABF an 8 = BF AB BF = ABan 8 = ( + )( ) = F BC AHO AB = +,r = HO AH = r AB r = + = + = an 8 = HO AH = BF A, O, F AB

32 ( + ) d = ( + ) d. d u = ; u; du = d d = udu = u du = ( + ) d = ( + ) + ) 4r r = = ( + ) 6

1 26 ( ) ( ) 1 4 I II III A B C (120 ) ( ) 1, 5 7 I II III A B C (120 ) 1 (1) 0 x π 0 y π 3 sin x sin y = 3, 3 cos x + cos y = 1 (2) a b c a +

1 26 ( ) ( ) 1 4 I II III A B C (120 ) ( ) 1, 5 7 I II III A B C (120 ) 1 (1) 0 x π 0 y π 3 sin x sin y = 3, 3 cos x + cos y = 1 (2) a b c a + 6 ( ) 6 5 ( ) 4 I II III A B C ( ) ( ), 5 7 I II III A B C ( ) () x π y π sin x sin y =, cos x + cos y = () b c + b + c = + b + = b c c () 4 5 6 n ( ) ( ) ( ) n ( ) n m n + m = 555 n OAB P k m n k PO +

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