In the range of real numbers, the following operations are not always performed______ Cubic, Nth power, odd power, even power

In the range of real numbers, the following operations are not always performed______ Cubic, Nth power, odd power, even power

Open even power. Seventh grade mathematics has no plural, even word root must be greater than or equal to zero

12.56 △ 12 equals (in fractions)

167/150

The answer to the fifth question of exercise 1.4

As shown in Fig. 1-2-20, expand the side of the regular prism so that the plane a ′ B ′ Ba and the plane B ′ C ′ CB are in the same plane and connect AC ', then AC' is the shortest path
In RT △ ACC ', AC = AB + BC = 5 + 5 = 10, CC ′ = 8
Ψ AC ′ + radical AC & sup2; + CC ′ & sup2; = radical 10 & sup2; + 8 & sup2; = Double radical 41 cm

The price of a coat is now reduced by 15%, which means () is () 15%

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Given the domain [a, b] of function f (x), find the domain of F [g (x)]

The range of inner function is the domain of outer function
Now the domain of the outer function f (x) is known, that is to say, the value domain of G (x) is [a, b], so the domain can make a

There are four classes in a school from 8:20 to 11:50 in the morning, with 45 minutes in each class and 10 minutes' break without exercises. Parents can only visit students during extracurricular time. If a student's parents randomly come to school between 8:00 and 12:00 in the morning, the probability that the parent will be able to see his or her children as soon as he or she comes is ()

A 8:00-8:20, visible in 20 minutes
B 30 minutes between classes,
C 11:50-12:00, visible in 10 minutes
So the visible time is less than the total time
（20+30+10）/(60*4)=25%

For a commodity, the original price is increased by 10%, and then the price is reduced by 10%
A. Constant B. increases C. decreases D. cannot be calculated

The current price is: 1 × (1 + 10%) × (1-10%), = 1 × 1.1 × 0.9, = 0.99; because 0.99 < 1, it is reduced

123456789 +. - how can it be equal to 100?
We can only add and subtract

123 - 4 - 5 - 6 - 7 + 8 - 9 = 100 123 - 45 - 67 + 89 = 100

Find a solution to a mathematical problem of increasing roots
If 6 / (x + 1) (x-1) - M / X-1 has an increasing root, then its increasing root is?

x=±1

What is the meaning of the decimal point

In primary school, the meaning of decimals is: like 0.3, 0.25, 0.676, which are used to express a few tenths, percentages, thousandths, called decimals