[r]
(1)! "
# $ %& ' " ( )"* + ,
# -./012
! "# $
% & '( #( ) * +
,- * + $
# 3./012
/,012 * +
⇒ = 678 478 /92 * +
⇒ = 678 4:8 /; 478 < 4:8 ⇒ =
(2)# /012
8 ; &> = =
= =
+
= + =
⇒ = =
"8 ? = @ A & ' )B C = C = D /? ≡ E< E"# B "# F
/? = * + < 3G & E< E
9 H I = E3 D3 DE
8 ;-* J* '( K E3 E @ * + < E : C* & L M J N "O : K &$
# 4./012
8 > = /; &>∆ = ∆
⇒ = 4N H P
"8 > = = 9&> = = ( )
⇒ − = −
⇒ = 478
/9&> + = "B8
+ = "B8
( )
= ∆ = ∆
⇒ = 4:8
/9& = (∆ = ∆ ) 4Q8 ; 47834:8 < 4Q8 )
( ) ∆ = ∆
⇒ = = 4N RP
(3)( ) ( ) = = ( ) ⇒ ∆ = ∆
⇒ = 4: & H P
# 5./012
/,0U #( ) < =
⇒U #( ) @ * + & 2%V
/9 H I &>U #( ) @ * + & < & V ,- U '( " @ * + ∆
# 6./012
8 ST ∆ &>
+ + = 4W Q & ∆8 + + =
⇒ + = − =
9&> + = + = = ST ∆ &>
( )
= − +
= − =
"8 ,0 '( @ * + X * < Y
( U Y Z 6" @ * + ( & U * + & U$
,- = = ⋅ =
8 ,0 '( " @ * + " N ( U Y
# 7./01
8 P ( ( [1% "# ( [9% $$$8 "8 ; + ) 1%\9%
] ) ( 19% + N % ] ) & %19 "# & %91
(4); ( [19 + N [ Z ^ X "
@ ) ( + @ ) [
X * M [ @ * + $
;)_ +( ` ( = * + [
a '( U #( ) ( " N U '( " @ * +
,- U = [
,- " G'( [3`3U B #( ) (= @ A
# 4-./01
; ( ( + N M Z ^ X
( + " @ ) " @ * + $ 1O <- )_ +( ( b " N $
# 43./012
/ST ∆ < ∆ &> [% \%2 <c8 1% \%9
= L M
( )
⇒ ∆ = ∆
⇒ = 4: & H P < = 4N H P /ST ∆ &> = (= )
⇒ ∆ + N ⇒ =
= 4R( )
⇒ = ⇒ ∆ + N [
@ X * % )d H I P (
# /012
(5)