b(t) = 7,5 mg/cm3 * (e-t/0.5h)
( e^term ) = e^term * ( terrm ) ´
Falls
term = -t / ( 0.5 * h )
ist dann
term = 1 / ( 0.5 * h ) * ( - t )
Ableitung nach t
term ´ = 1 / ( 0.5 * h ) * ( - 1 )
term ´ = - 1 / ( 0.5 * h )
b(t) = 7,5 mg/cm3 * (e-t/0.5h)
b ´ ( t ) = 7,5 mg/cm3 * (e-t/0.5h) * [ - 1 / ( 0.5 * h ) ]