求方程解?(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%请高手帮忙列出计算过程,拜托了.

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求方程解?(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%请高手帮忙列出计算过程,拜托了.
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求方程解?(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%请高手帮忙列出计算过程,拜托了.
求方程解?(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%
(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%请高手帮忙列出计算过程,拜托了.

求方程解?(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%(X-9%)/(8%-9%)=7.83/7.78,最后得出X=8.05%请高手帮忙列出计算过程,拜托了.
(X-9%)/(8%-9%)=7.83/7.78
(X-9%)/(-1%)=7.83/7.78
X-9%=-1.0064%
X=-7.9936%
题目写错了吧

anbn公比分别是p,q
c(n+1)/cn
=[a(n+1)+b(n+1)]/(an+bn)
=(pan+qbn)/(an+bn)
=[p(an+bn)+(q-p)bn]/(an+bn)
=p+(q-p)bn/(an+bn)
q-p≠0
所以(q-p)bn/(an+bn)不是常数
则c(n+1)/cn不是常数
所以cn不是等比数列