救命!by rewriting each part of the expressions and then using

61231482022-10-04 11:39:545条回答

救命!
by rewriting each part of the expressions and then using index laws,reduce each of the following to simplest from
a）9^3 / 3^N
b) 4^2n / 2^3 乘以 2^n+1 / 8
c ) 25 / 5^n+1 乘以 5^2n / 125

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漂潇孤飞雁共回答了15个问题 | 采纳率100%: 重写多项式,把它们简化了
又不是选择题,选什么A
a)
3^6 / 3^N
=3^(6-N)
b)
2^2n / 2^3 × 2^(n+1)/2^3
=2^(2n-3) × 2(n-2)
=2^(3n -5)
c)
5^2 / 5^(n+1) × 5^2n/5^3
=5^(1-n) × 5(2n - 3)
=5^(n-2); 1年前

chenyu007_5 共回答了3个问题 | 采纳率: 多选A; 1年前

风铃-寒月共回答了154个问题 | 采纳率: 简化多项式而已
a）9^3 / 3^N
=3^6/3^n
=3^(6-n)
b) 4^2n / 2^3 乘以 2^n+1 / 8
c ) 25 / 5^n+1 乘以 5^2n / 125
没什么特别的啊,自己做吧; 1年前

idcdj 共回答了1个问题 | 采纳率: 选A; 1年前

酒窝窝儿共回答了13个问题 | 采纳率: 不懂也不要误导人家呀，唉; 1年前

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救命!by rewriting each part of the expressions and then using

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