BankerRUS wrote:

For the first statement:

isn't n^5*(1-n^4) the same as n^5/n^5n^4??

In this case would A be sufficient. What am I missing?

Hi BankerRUS

You mean n^5*(1-n^4) the same as

(1) [n^5/n^5n]^4

--OR--

(2) n^5/[(n^5n)^4].

Both of them are incorrect.

First, n^5*(1-n^4) = n^5 - n^9

But:

(1) [n^5/n^5n]^4 = n^20/n^20n

(2) n^5/[(n^5n)^4] = n^5/n^20n

So (1) and (2) differ from n^5 - n^9

Hope it's clear.

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