计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
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计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1
计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
计算a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
a^2n+1-6a^2n+9a^2n-1/a^2-9除以a^n+1+4a^n+4a^n-1/a^2-4
=[a^(2n-1)*(a-3)^2]/(a^2-9) * （a^2-4)/[a^(n-1)*(a+2)^2]
=[a^n*(a-3)(a-2)]/(a+3)(a+2)
计算:(3a^n+2+6a^n+1-9^n)÷3a^n-1
分式 计算：a^(2n+1)-6a^(2n)+9a^(2n-1) / a^(n+1)-4a^n+3a^(n-1)
计算(3a^n+1-6a^n+9a^n-1)/(1/3a^n-2)
计算：(6a^n+2-9a^n+1+3a^n-1)÷3a^n-1
(3a^（n+1）+6a^（n+2）-9a^n)/3a^（n-1）是计算
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(3a^n+1+6a^n+2-9a^n)/3a^n-1
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