Final answer:
The question pertains to solving a linear algebra equation for variable w by applying inverse operations.
Step-by-step explanation:
The student's question appears to be related to linear algebra, specifically solving a linear equation to find the variable w. The equation provided is w (KT + λI) = yK, and the goal is to solve for w. To do this, we need to manipulate the equation algebraically by multiplying both sides by the inverse of (KT + λI), provided it exists, to isolate w on one side. This inverse operation would result in w = yK(KT + λI)-1.