post the whole question.
Hint: consider three cases:
1) aK < bL
2) aK > bL
3) aK=bL
and find the marginal capital in each.
The whole question is :
Compute marginal products of labor and capital and the marginal rate of technical substitution and sketch the isoquants for the following production function: [min{aK,bL}]^α
marginal products of labor: α[min{aK,bL}]^α-1*(0, if L>K; b if L<K)? is it correct?