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# answer55 - 5501 x 1 1 1 x = x x x x 1 1 1 1 1a 1 x = 2 x 1...

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Unformatted text preview: 5501 x+ 1 1 +1 + x + = x x x x+ , 1 1 1 1 1a , +1 - x + = 2 x + + 1 = x + = a a a2 - 4a - 4 = 0 x x x x x 1 ) x + = 2+2 2 x2 - 2(1+ 2 )x + 1 = 0 x=1+ 2 2 + 2 2 a = 2+2 2 (a x , E i @ iEA'*4t4 i* Ъ oE * , a , 5502 9 , 712 + s* 724( E t i* Ъ u * 815 , 7a 1a 6a 4a 5a 232 a ) 3a 0a 1 * 317 , a a , b, c a a + b + c = 1, 2 , a 2 + b 2 + b 2 + c 2 + c 2 + a * , a + b + c =1 a a A b c D AB = a 2 + b 2 B BC = b 2 + c 2 EF = c 2 + a 2 AB + BC + EF CA + EF = DE + EF DF = 2 a b c F ~, * * ' +C @ ~d a 2 + b2 + b2 + c2 + c2 + a2 3a E C 5 712d ~ ' C @ * 7 1 6 2 5 317 n E i * 1 0 1 232 * 5503 ABC ,a 2 * ABC - 4ac 0, ,a 13~ a, b ,a xa x 2 - (2m + 7) x + 4m(m - 2) = 0 (1) D b ( 2m + 7) -16m( m - 2) 0 2 (2)ab 4m(m 2) 0 (3)a b 2m 7 0 (4) a + b = 13 2 2 2 2 ( a + b) - 2ab = 169 ( 2m + 7) - 2 4m(m - 2) = 169 2 2 m - 11m + 30 = 0 m = 5 6 ( 6 ABC 1 ab a 2m(m 2) 30 2 (1)) m 5 12 * d [email protected]' * C 5504 a [email protected] 7k E 75* iE 1 (8 - 1)(8 - 2)(8 2 - 3 8 + 12) = 91 24 1. a * n ~ * *4 E i n 1 n [4 C 4 + n(n - 3)] a 2 na n3+ * s u ny x * S~ n C4 4a n VE 1 n n + F = 2 a [n + C 4 ] - { [4 C 4 + n(n - 3)] + n} + ( S + 1) = 2 * 2 S= a 2. a a 1 (n - 1)(n - 2)(n 2 - 3n + 12) a 24 + 1) i =1 i n C 2 - n a a ai a n n C2 - n n ~N ) = ( n C2 - n i ~d*@C' (a S = 1+ a a (a i + 1) = 1 + a i =1 i n + C2 - n a n C2 - n a i =1 =a n n = C4 n n S = 1 + C4 + C 2 - n = 1 ( n - 1)(n - 2)(n 2 - 3n + 12) 24 1. a 7a , 2. 7 3. 2 \$ E k @ 8 5505 (2 a ) 4 Euler a V E + F = 2j E k [email protected] , 200 j k [email protected] A a Ba B a A)k @ E7 d ~ C'* a a 197 * xi E (1), Aa B * * AaB ~dC'* * B s* u (2) A B s* u a (1)(2)Pi * E a a 7a 7 2 8 a 6 a (1 a ) * 5 (4 a ) @ # E y (x ]i E Aa B * Aa , B * 197 A 197 AaB * 6 xk 197 X* ...
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