How to find the value of R ?

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

[Greg Heath]

Please separate equations by putting them on separate lines.

Thanks.

[Walter Roberson]

Reformatted, but they are hard to interpret that way too.

Answer 1

[Carlos]

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

Answer 2

[Tae Yeong Kim]

It is very hard to interpret the equations. Could you form the equations neatly?

Answer 3

[Image Analyst]

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.

Answer 4

[Walter Roberson]

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.

Answer 5

[dashty]

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)