Differentiate the following: sqrt[10/(4+x)]

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i need to differentiate the following:

sqrt[10/(4+x)]

so i re-wrote it as:

[10(4+x)^-1]^1/2

but am getting very confused when i try to differentiate it.

any help would be great! cheers
 
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Fairy111 said:
i need to differentiate the following:

sqrt[10/(4+x)]

so i re-wrote it as:

[10(4+x)^-1]^1/2

but am getting very confused when i try to differentiate it.

any help would be great! cheers
Could you show your attempt at differentiating the expression?
 


Step by step using the chain rule
What is the derivative of u-1/2?

What is the derivative of v-1?
 


well first i differentiated 10(4+x)^-1
which is -10(4+x)^-2

but i don't know how to include the sqrt...
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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