√5-1/√5+1 +√5+1/ V5-1=a+b√5
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(√5-1)^2/(√5+1)(√5-1)+(√5+1)^2/(√5+1)(√5-1)
(5+1-2×√5×1)/(5-1)+(5+1+2×√5×1)/(5-1)
(6-2√5+6+2√5)/4
12/4+0×√5/4
3+0×√5
so,a=3,b=0
(5+1-2×√5×1)/(5-1)+(5+1+2×√5×1)/(5-1)
(6-2√5+6+2√5)/4
12/4+0×√5/4
3+0×√5
so,a=3,b=0
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