2, (8) is 0. 125, and the reciprocal of 3/4 is (4/3).
3. If abc is less than 0 and A and B are different numbers, then C (
4.X and y satisfy that xy is not equal to 0, so the maximum value of m = absolute value of x/x+absolute value of y/y is (2).
5. It is known that x y is reciprocal, m n is reciprocal, and the absolute value of a is 2. Find the absolute value of m(x+y)/ 10an+a-the value of ——Mn.
X and y are reciprocal, so x+y = 0;
M and n are reciprocal, so Mn =1;
The absolute value of a is 2, |a|=2.
So m(x+y)/ 10an+|a|-mn=2.
6. Observation: 4-2=4÷2, 9/2-3=9/2÷3,-1/2-1/2.
(1) The above equations all have a characteristic, and the (difference) of some two rational numbers is equal to the (quotient) of these two rational numbers. If the first number on the left side of the equal sign is represented by X and the second rational number is represented by Y, then the * * * identity characteristics of these equations can be represented by an equation containing X and Y (x-y=x/y).