Why is lne ^ - 3x equal to - 3x?

Why is lne ^ - 3x equal to - 3x?

There is a formula lne ^ x = xlne

Lne is not much

1

There are four conclusions: (1) LG (LG10) = 0; (2) LG (lne) = 0 & nbsp; (3) if 10 = lgx, then x = 10 & nbsp; (4) if e = LNX, then x = E2, where ()
A. ①③B. ②④C. ①②D. ③④

For ∵ LG (LG10) = LG1 = LG0, so for ∵ LG (lne) = LG1 = 0 ∵ ② for ③, ∵ 10 = lgx ∵ x = 1010 ∵ ③ wrong for ④, ∵ e = LNX ∵ x = EE ∵ ④ wrong, so choose C

How much is 27 Jiao

27 Jiao equals 0.27 yuan

The square of A-6A + 9=

=The square of (A-3)
Learning from the sea in the same boat

Log (0.5) (x + 2) > log (2) (1 / x)

∵ log(0.5)(x+2) > log(2)(1/x)
∴ [lg(x+2)]/lg0.5 > [lg(1/x)]/lg2
∴ -[lg(x+2)]/lg2 > -lgx/lg2
∴ lg(x+2) < lgx
∴ x+2 < x
So the original inequality has no solution and the solution set is empty
If according to the upstairs solution, x > 0. We might as well take x = 2, then inequality left = - 2, right = - 1, then - 2 > - 1, get contradiction; so upstairs solution is wrong!

2 hectares, 20 hectares, 2000 square meters, 0.2 square kilometers, which is the largest?

0.2 square kilometers
0.2 square kilometers = 200000 square meters
2 ha = 20000 m2
20 hectares = 2000 square meters
2000 square meters = 2000 square meters
It can be concluded that 0.2 square kilometers is the largest

If y is the square of X, then the square of Y minus x equals

The square of x minus x

Let f (x) = g (x) / x, X ≠ 0; 0, x = 0, where g (x) is differentiable and G 'is the second derivative at x = 0
Advanced Mathematics
Let f (x) = g (x) / x, X ≠ 0; 0, x = 0, where g (x) is differentiable, and the second derivative G '' (0) exists at x = 0, and G (0) = g '(0) = 0, try to find f' (x), and discuss the continuity of F '(x)
What is the differential mean value theorem

77 + 79 + 79 + 80 + 81 + 83 + 84 can you calculate it in a simpler way?

79+81=80+80
77+83=80+80
79+84=80+80+3
So it's seven eighties plus three
The result is 563