Answer:
Step-by-step explanation:
![a.\\\frac{d}{dx}(\frac{-1}{1+x^2} )=\frac{d}{dx} [-1(1+x^2)^{-1}]=-1(-1)(1+x^2)^{-2}(2x)=\frac{2x}{(1+x^2)^2 }\\](https://tex.z-dn.net/?f=a.%5C%5C%5Cfrac%7Bd%7D%7Bdx%7D%28%5Cfrac%7B-1%7D%7B1%2Bx%5E2%7D%20%29%3D%5Cfrac%7Bd%7D%7Bdx%7D%20%5B-1%281%2Bx%5E2%29%5E%7B-1%7D%5D%3D-1%28-1%29%281%2Bx%5E2%29%5E%7B-2%7D%282x%29%3D%5Cfrac%7B2x%7D%7B%281%2Bx%5E2%29%5E2%20%7D%5C%5C)
b.
put 1+x²=u
2x dx=du
when x=0,u=1
when x=2,u=1+2²=5
9514 1404 393
Answer:
S = 4.5π ≈ 14.14 units
Step-by-step explanation:
The arc length is given by ...
s = rθ . . . . . r = radius; θ = central angle in radians
The angle 135° is ...
135° = 135°(π/180°) = 3π/4 radians
The arc of interest has length ...
s = 6×3π/4 = 9/2π ≈ 14.14 . . . units
Hello!
You can draw a picture where Bill's pizza is bigger than Gina's
Hope this helps!
Answer:
I want to say the answer is D
Step-by-step explanation:
I think is a because if you see and do it you could see
