1. A simplest fraction, which expands its numerator by four times and reduces its denominator to one fourth of its original value, is equal to 25. This fraction is ()

1. A simplest fraction, which expands its numerator by four times and reduces its denominator to one fourth of its original value, is equal to 25. This fraction is ()

1. If the numerator is four times larger, the fractional value will be four times larger; if the denominator is four times smaller, the fractional value will be four times larger. We can push back
2. Original score: 25 △ 4 × 1 / 4 = 25 / 16

2X times x minus 2x times 3 equals x minus 3 formula solution

Fill in the blanks according to the following rules: (1) 4,7,10, + 13, then item 20 is () (2) 1,5,9,13, then item n is ()
(3)
one
2,3
4,5,6,7
8,9,10,11,12,13,14,15
``````
According to this rule, there are () positive integers in line n

(1) The rule is 3N + 1, so item 20 is (61)
(2) The rule is 4n-3, so the nth term is (4n-3)
(3) The rule is (n-1) power of 2, so the nth line has (n-1) positive integers

Fill in the blanks according to the rules: 1 / 6, 1 / 2, (), 4 / 2, 13 / 2

1 / 6, 1 / 2, (3 / 2), 4 / 2, 13 / 2
The number at the back is three times that at the front