1. 2c-d/c² d + c+d/cd²
2. L=a+(n-1)d find n
問2題數學題!!
2006-11-29 1:53 am
回答 (3)
2006-11-29 5:11 am
✔ 最佳答案
1. 2c - d/c² d + c+d/cd²=2c - 2d/c² d² + 2c+d/c²d²
=2c - 2d+ 2c+d / c² d²
=4c - d / c² d²
2. L=a+(n-1)d find n
L= a+(n-1)d
L - a= (n - 1)d
L - a = dn - d
L - a+ d = dn
L - a+ d / d = n
n = L - a+ d / d
2006-11-29 2:27 am
2) L = a+dn-d
dn=L+d-a
n=(L+d-a)/d [ans]
dn=L+d-a
n=(L+d-a)/d [ans]
2006-11-29 2:24 am
1.3c-(c+d)c² d
2.n=L-n+1
2.n=L-n+1
收錄日期: 2021-04-13 14:41:36
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