He asked me to take a book to correct my mistakes

He asked me to take a book to correct my mistakes

Ask for something from someone or something: borrow some books from him
So there is no mistake in asking
"Book" is a collective concept, not "one book" or "two books" To modify or restrict with a quantifier such as
To be amended as follows:
He asked me if I had borrowed a book

There are so many books in the book corner

There are so many books in the book corner

AB vertical AC, vector BD = 5 / 3, vector BC, AC = 2, find vector ac * vector ad

AB vertical AC
=> AB.AC =0
AC.AD
= AC.(AB+BD)
= AC.AB + AC.BD
= 0 + AC.( (5/3)BC)
= (5/3) AC.( AC -AB )
= (5/3) |AC|^2
= 20/3

Application of percentage (3)
A pile of coal is transported in two days. 45% of the coal is transported in the first day and 14.3 tons in the second day. What percentage of the coal is transported in the second day? How many tons is the total weight of the coal?
Also explain what unit "1" is

55%x=14.3
x=26
The next day, 55% of the coal was transported, which weighed 26 tons

What are the similarities and differences between the contract and similarity of matrices

Congruent or similar matrices must have the same rank, so they must be equivalent
But contracts are not necessarily similar, and similarity is not necessarily a contract
But the orthogonal similarity is the same as the contract

The quotient and remainder of 168 divided by 1 are the same. What is the maximum number of two digits?

83

Calculation of real exponential power by calculator

1．a＾x×a＾y＝a＾（x＋y）2．（a＾x）＾y＝a＾（xy）

A column of numbers, the first two numbers are 1, 3, starting from the third number, each number is the sum of its first two numbers, that is, 1, 3, 4, 7, 11, 18, 29 Up to the 2006 number, there are______ It's an odd number

This sequence is arranged in the order of "odd, odd and even"; there are two odd numbers and one even number in each group; 2006 △ 3 = 668 (Group) 2; the remainder is 2, both of which are odd; 668 × 2 + 2 = 1338; a: there are 1338 odd numbers

Approximate 52000, accurate to________ Yes, there are_________ A significant number

Accurate to 100 (50 in 10000, 2 in 1000, 0 in 100)
There are three significant numbers

Xiao Jun read a book. On the first day, he read 1 / 4 of the whole book. On the second day, he read a ratio of 1:5 to the total number of pages. In two days, he read 36 pages in total. How many pages are there in this book?

The whole book is 36 (1 / 5 + 1 / 4) = 80 pages