lim(5×2^(n-1)-2)/(5×2^n-5-2×n)
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lim(5×2^(n-1)-2)/(5×2^n-5-2×n)
lim(5×2^(n-1)-2)/(5×2^n-5-2×n)
lim(5×2^(n-1)-2)/(5×2^n-5-2×n)
你这极限是n趋近无穷吗,是的话就上下同时除以2^n,然后再极限,就能得到答案,希望你自己做出来,我就不说答案了,不懂再给你说答案.
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lim(5×2^(n-1)-2)/(5×2^n-5-2×n)
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