Derivative of function f (x) = 2E ^ x

Derivative of function f (x) = 2E ^ x

f(x)=2e^x
f '(x) =(2e^x')
=2e^x

Given the derivative of F (x) = x ^ 2 + 2x * f (1), then the derivative of F (0) =?

F '(1) is a constant
So f '(x) = 2x + 2F' (1)
Let x = 1
f'(1)=2+2f'(1)
f'(1)=-2
f(x)=x²-4x
So f '(x) = 2X-4
f'(0)=-4

Why is the derivative of 2x / (1-x ^ 2) 2 (1 + x ^ 2) / (1-x ^ 2) ^ 2
Let m = 2x, n = 1-x ^ 2
y'=(m/n)'=m'n-n'm=2(1-x^2)-(-2x)*2x-=2+2x^2
Why does the correct answer have a denominator? I don't understand

You remember the formula wrong
It should be (M / N) '= (m'n-mn') / N ^ 2

But there is enough feed for the cows?

Feed (1) V feeding
(2) N feed; forage
So:
There is enough feed for the cows

I have hardly enough strength left to my feed?

You have the wrong number of feed. It should be a feed
There is hardly any strength left on my feet
I hardly have enough strength left to my feet
I hope my answer can help you
PS: stand on my feet

English translation

If we go on like this, there won't be enough arable land in the world to feed everyone

Feed preposition!
I want to be more specific. All possible SATs, such as feed by, have appeared before, but not online. So please don't just copy and paste,

The food () the bag is bad
The food ( ) the bag is bad.Throw The bag () food away

in ; of
In the bag
The bag of
The food in the bag is broken. Throw it away

Feed the monkeys____ the monkeys.

Don't feed the monkeys.

Please clean the room, it's dirty
Is up really a preposition?

It's really up
This is how prepositions are used
In fact, there is no usage problem, just a fixed collocation, clean up is the meaning of cleaning
Some people will confuse clean up with clean out. Clean out tends to "clean up", while clean up tends to "clean up", which means throwing things away