Partial Differentiation of Summations for Finding Derivatives

[kerry michael]

Homework Statement

By differentiating the summation, show that ∂/∂b₀ ƒ(b₀ , b₁) = -2 ∑_(i=1)^n (y₁ - b₀ - b₁x₁)

Homework Equations

the ‘derivative of the sums’ equals ‘the sum of the derivatives’:

The Attempt at a Solution

How would we partially differentiate a summation in order to add up the derivatives which would find the derivative of the summation.??

 

[HallsofIvy]

Way back in Calculus 1 you learned that (f+ g)'= f'+ g' didn't you?