已知 1 a + 1 b + 1 c + 1 d = 30 43 , \frac{1}{a+\frac{1}{b+\frac{1}{c+\frac{1}n5n3t3z}}}=\frac{30}{43}, a+b+c+d1?1?1?1?=4330?,且 a , b , c , d a,b,c,d a,b,c,d為正整數(shù),求 a , b , c , d a,b,c,d a,b,c,d的值。
①右側(cè)除以 30 30 30
1 a + 1 b + 1 c + 1 d = 1 43 30 = 1 1 + 13 30 \frac{1}{a+\frac{1}{b+\frac{1}{c+\frac{1}n5n3t3z}}}=\frac{1}{\frac{43}{30}}=\frac{1}{1+\frac{13}{30}} a+b+c+d1?1?1?1?=3043?1?=1+3013?1?
②右側(cè)除以 13 13 13
1 b + 1 c + 1 d = 13 30 = 1 30 13 = 1 2 + 4 13 \frac{1}{b+\frac{1}{c+\frac{1}n5n3t3z}} =\frac{13}{30}=\frac{1}{\frac{30}{13}}=\frac{1}{2+\frac{4}{13}} b+c+d1?1?1?=3013?=1330?1?=2+134?1?
③右側(cè)除以 4 4 4
1 c + 1 d = 4 13 = 1 13 4 = 1 3 + 1 4 \frac{1}{c+\frac{1}n5n3t3z} =\frac{4}{13}=\frac{1}{\frac{13}{4}}=\frac{1}{3+\frac{1}{4}}\\ c+d1?1?=134?=413?1?=3+41?1?文章來(lái)源:http://www.zghlxwxcb.cn/news/detail-615668.html
④總結(jié)
則 a = 1 , b = 2 , c = 3 , d = 4 a=1,b=2,c=3,d=4 a=1,b=2,c=3,d=4文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-615668.html
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