How to find the value of R ?

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dashty
dashty 2013-2-17
If
R1 = 0.173*(E^3/2)*A1^1/3
R2 = 0.173*(E^3/2)*A2^1/3
R3 = 0.173*(E^3/2)*A3^1/3
Wi = (Ni*Ai)/M
for R1 Ni = 10 & A1 = 12
for R2 N2 = 8 & A2 = 1
foe R3 N3 = 4 & A3 = 16
M = sum(Ni*Ri)
E = ( 1,2,...,10)
Then
1/R = sum(wi/Ri)
Find R
  2 个评论
Greg Heath
Greg Heath 2013-2-17
编辑：Image Analyst 2013-2-17
Please separate equations by putting them on separate lines.
Thanks.
Walter Roberson
Walter Roberson 2013-2-17
Reformatted, but they are hard to interpret that way too.

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采纳的回答

Carlos
Carlos 2013-2-18
Is this what you mean?
>> A=27;
>> E=1:1:10;
>> R = 0.173*(E.^3/2)*A.^1/3
R =
Columns 1 through 9
0.7785 6.2280 21.0195 49.8240 97.3125 168.1560 267.0255 398.5920 567.5265
Column 10
778.5000

更多回答（4 个）

Tae Yeong Kim
Tae Yeong Kim 2013-2-17
编辑：Tae Yeong Kim 2013-2-17
It is very hard to interpret the equations. Could you form the equations neatly?
Image Analyst
Image Analyst 2013-2-17
Isn't it just
R = 1 ./ sum(wi./Ri)
????? Of course that assumes you already know what wi and Ri are, which none of us do.
Walter Roberson
Walter Roberson 2013-2-17
N = [10 8 4]
A = [12 1 16];
R = ??
M = sum(R .* N);
W = (N .* A) ./ M;
Final_R = 1 ./ sum(W .* R);
Unfortunately the definition of R(i) is confused as it is based upon E which appears to be 1:10.
dashty
dashty 2013-2-18
Thanks for all I need the value of R in this equation
R = 0.173*(E^3/2)*A^1/3
If the value of A = 27 and
E= (1,2,3,4,5,6,7,8,9,10)

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