(x power of E + negative x power of E) / (x power of E - negative x power of E) = 2, find the value of X (the result is expressed by natural logarithm)? How to do it? Thank you!

(x power of E + negative x power of E) / (x power of E - negative x power of E) = 2, find the value of X (the result is expressed by natural logarithm)? How to do it? Thank you!

(power X of E + power X of E) / (power X of E - power X of E) = 2, (power X of E + power X of E) = 2 (power X of E - power X of E) 3E = power X of E (power X of E) ^ 2 = power X of E = √ 3 x = ln √ 3 = (1 / 2) Ln3

The proposition "the derivative of function y = f (x) is f (x) ′ = x power of E + K & # / x power of E - 1 / K (where e is the base of natural logarithm and K is a real number),
And f (x) is not a monotone function on R "is a true proposition, then the value range of real number k is

(x) f (x) is not a monotone function on R, and the symbols of F (x) are positive and negative. F (x) (x) is not a monotone function on R, and the symbols of F (x) are positive and negative. F (x) (x) is not a monotone function on R, and the symbols of F (x) are positive and negative. F (x) (x) (x) (x) = e ^ x (x) = e ^ x-k-k-k-k-k \\\35\\\\35\\\\35\\\\\\\\3535\\\\\\\\and

The English phrase "understanding"
The more, the better...

Get to know; learn about; inquire about;

In △ ABC, ∠ BAC = 90 °, extend Ba to point D, so that ad = &# 189; AB, point EF are the midpoint of BC and AC respectively, passing through point a as Ag ‖ BC, intersecting DF with point G to prove Ag = dg

I don't know if you've learned similar triangles? If you've learned similar triangles, it's much easier. Because of BC / / Ag, ∠ CBA and ∠ GAD are in the same position. That is to say, ∠ CBA = ∠ GAD in △ BAC and △ DAF, ad is half of AB, AF is AC in general, proportional, and because ∠ BAC = ∠ DAF = 90 ° so △ BAC and △ DAF are in phase

Is there a book in the desk?

Are there books in the desks?

In the triangle ABC, tanb = 1, Tanc = 2, B = 100, find the edge a

tanA=-tan(B+C)=-(1+2)/(1-1*2)=3=3/1===>sinA=3/√10
tanB=1===>sinB=√2/2
∴a=b*sinA/sinB=100*(3/√10)/(√2/2)=60√5
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Can't, her, first, name, the, spell, girl

The girl can't spell her first name.
The girl can't spell her name
If you are satisfied with the answer, please remember to adopt it

Rectangular ABCD is a 30 cm long and 20 cm wide ceramic tile
The shadow part is a diamond. Efgh is the midpoint of the four sides of the rectangle. There is a 3.9m long and 2.6m wide wall. After the wall is pasted, there are at most several diamonds with the same area on the wall, among which there are patterns (shadow part)?

3.9 / 0.3 = 13; 2.6 / 0.2 = 13, so there are 13 tiles on the wall, because a tile has a diamond in the middle, so there are 13 * 13 = 169 patterns. Draw a table of 13 * 13 squares, find that each intersection will have a diamond, so there will be 12 * 12 = 144 diamonds, so there are 169 + 144 = 313 areas

What is the opposite of wet?

dry
It's dry

A = 10, B = 10 times root sign 2, a = 45 degrees, solving triangle

High school students yo
According to the sine theorem
SINB = B · Sina / a = 10 times root 2 × (root 2 / 2) △ 10 = 1
So B = 90 degrees
From Pythagorean theorem: C = 10
C=180°-A-B=45°
To sum up, B = 90 °, C = 45 ° and C = 10