3 times 3 and 3 to the second power
1. By the chain rule,
I'm going to switch up the notation to save space, so for example, is shorthand for .
We have
Similarly,
where
To capture all the partial derivatives of , compute its gradient:
2. The problem is asking for and . But is already a function of , so the chain rule isn't needed here. I suspect it's supposed to say "find and " instead.
If that's the case, then
as the hint suggests. We have
Putting everything together, we get
2 × π = 0.6
π = 0.6/2
π = 0.3
Answer:
8.0x
Step-by-step explanation:
The total distance is 198 km
The rate is 36 km/h
The formula for the time of travel is
t = d / r
where t is the time of travel
d is the distance
r is the rate
Substituting,
t = 198 / 36
t = 5.5 h
The answer is 5.5 h.