Given that the solution set of inequality (3a-2) x + 2 less than or equal to 3 is x less than or equal to 2, what is the value range of a

Given that the solution set of inequality (3a-2) x + 2 less than or equal to 3 is x less than or equal to 2, what is the value range of a

(3a-2)x+2≤3
(3a-2)x≤1
Because x ≤ 2
So (3a-2) > 0, a > 2 / 3, X ≤ 1 / (3a-2)
1/(3a-2)≥2
6a-4≤1
2/3

178-87.21﹢43﹢2∕21﹢53﹢19∕21-12.79
In a hurry in a hurry in a hurry in a hurry

175
178+43+53+1-（87.21+12.79）

If the tangents of curve X ^ 2 + y ^ 2 = 6 and curve y = ax ^ 2 + 1 at the intersection are perpendicular to each other, then the positive number a=

According to the combination of number and shape, a circle and a parabola intersect at two points (- radical 3, radical 3), (radical 3, radical 3). Substituting the parabola into a = 2 / 3... Draw a picture and even know the intersection of two tangent lines (0, 2, radical 3)

The solution set of inequality (2a-1) x + A + 1 greater than 0 is x less than 2, and the value of a is obtained

(2a-1) x + A + 1 > 0 solution set X

15.9 △ 15 calculate and check with vertical type

15.9÷15=1.06
one point zero six
________
15)15.9
fifteen
_____
ninety
ninety
______
0
checking calculation:
one point zero six
× 15
_______
five hundred and thirty
one hundred and six
______
fifteen point nine zero

Finding the limit of LIM (x → 0) TaNx / tan5x

Substituting limx with equivalent infinitesimal tends to otanx / tan5x = limx tends to o x / 5x = 1 / 5

How to get y '= x & # 178; - 4 in the extremum of function y = x & # 179 / / 3-4x + 4

F '(x) = 1 / X & # 8308; - 4 Let f' (x) = 0, and the solution is x = ± √ 2 / 2, because x ≠ 0, so
F (x) has a maximum value when x = - √ 2 / 2, f (- √ 2 / 2) = 4 + 4 √ 2 / 3
F (x) has a maximum value when x = √ 2 / 2, f (- √ 2 / 2) = 4-4 √ 2 / 3

Is the building elevation relative or absolute?
Such as the title

Let me tell you: building elevation is relative elevation
The absolute elevation of China is 0.00 of the yellow sea level, so it is also called the elevation of the Yellow Sea. But in the specific application of construction engineering, it is impossible to always take the absolute elevation as a matter of trouble. It is very troublesome to specify a certain height equivalent to the absolute elevation as 0.00 of the relative elevation. Then, the elevation of this building is based on ± 0.00

In the limit of higher number, how to distinguish infinity from no solution?
It needs an official explanation
The best example to give,

Infinity (take the sequence limit as an example) means that for any positive number m, there exists n. when n > N, | an | > M. at this time, we say that when n tends to positive infinity, the sequence an tends to infinity. At this time, the limit does not exist (infinity is not a real number). For example, an = n & sup2;
Of course, there is no limit. There are other cases, such as 1, - 1,1, - 1,1, - 1

The solution equation: X-65% x = 70 120% x-x = 0.849 + 40% x = 89

（1）x-65%x=70，           35%x=70，      35%x÷35%=70÷35%，              x=200；（2）120%x-x=0.8，        20%x=0.8，   20%x÷20%=0.8÷20%，           x=4；（3）49+40%x=89，  49+40%x-49=89-49，        40%x=40，   40%x÷40%=40÷40%，           x=100．