Rapper
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Oh, I made a mistake, sorry...
It'sa(n+2) = [a(n) + a(n+1)]/2
How can I calculate a(5)?
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Give an explicit form each of the terms:
a(1) = 1
a(2) = 3
a(n+1) = [a(n) + a(n+1)]/2
I just started with this topic. How can I calculate what a(n) is?
Should I replace a(n) by 1 and a(n+1) by 3 and divide the result by 2? Would that give me de?0
Minimal Area of a Cone
in Analysis and Calculus
Posted · Edited by Rapper
A cylinder with radius r=0.75 m and height h = 1 m has to be covered by a cone. Find the minimal area for the cone.
Surface Area of Cone: pi*r^2 + pi*r*L
So, I figured out:
H= Height of the cone
R= Radius of the cone
(H-1)/0.75 = H/R
H=-4R/(-4R+3)
To calculate L, I used the Pythagoras & substituted H from above:
L = sqrt(R^2+H^2)
L = sqrt(R^2+(-4R/(-4R+3))
L = (sqrt(16R^4-24R^3+25R^2)/(4R-3)
I see I'm heading towards something really complicated...
Could you please help me find the right way to do it? I have just started doing this.