- #1
ElectricRay
- 73
- 18
Homework Statement
I have given two graphs which i try to show in the picture here. The question into find u'(1) and v'(5)
Homework Equations
So the relevant equations here are the Product Rule and the Quotient Rule, which I know and is not the big problem here. I think (but imnot sure) the issue here is to find the primitive functions. But these graphs change ? For example the function f(x) has 3 different equations IMHO see x=-2 till 0 and x=0 till 2 and x=2 till 7 (at least that's what visible on the given graph)
The Attempt at a Solution
Well I could determine the slopes and create 3 linear functions for f and two linear functions for g.
the slope for f(x) in interval x = 0 till 2:
m = (4-0)/ (2-0) = 2
y(2) = 2*2 + b = 4
b = 0
So I can say that f = 2x+0, All great but i think I am completely lost. Main thing I don't understand the question?
The derivative is the slope (right?), but if I don't have the functions how can I determine the slope, well I just did that so what should I do now. Or is my answer m= 2 basically u'(1)? This seems like but it would also be for u'(1.5).
Can anybody tell me where I miss the point? And next when would this happen in a practically situation? I like to connect the things to real life situations.
Thanks in advance and apologizes if someone can't understand my confusion. I have calculus on school but they try to teach me everything with about 50 exercises so I bought A big calculus book and doing the exercises alone as I'm doing distance learning no teachers around.