Question
a.
\(σ_z=\frac{2q’}{πz}\)
b.
\(σ_z=\frac{3q’}{πz}\)
c.
\(σ_z=\frac{2q’}{πz}\frac{1}{[1+(z)^2 ]^2} \)
d.
\(σ_z=\frac{2q’}{z}\)
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