latek

\(

μ_k (x) =
left lbrace
matrix {
{(x-a_{k-1} )^{^4}} over ( a_k – a_{k-1} )^{^4}  ,  a_{k-1} ≤ -x ≤ a_k ##
{(x-a_{k+1} )^{^4}} over ( a_{k+1} – a_k )^{^4}  ,  a_k ≤ -x ≤ a{k+1}
}

\) \(displaystyle f_{rec} = frac{c+v_{mobile}}{c} f_{em}\)