transient analysis

php

i was trying to solve this question(file attached), but i can only come up with the answer:

i assumed i_L=0 at t=0, hence arrived at this:

I_L(t) = 6mA(1 - exp(-100000t))

i can't figure out how I_o came about.

can someone come it my rescue and tell me how the I₀ came into play.

Kind Regards,

Attached Files

problem.pdf (86.3 KB, 6 views)

php

anyone to help?