Discussion
A star orders the frontier by \( f(n) = g(n) + h(n) \). What do the two terms represent?
Answer: D
The evaluation function combines the exact cost from the start with an estimate of the cost to the goal, giving an estimate of the total cost of the best solution through that node. Minimising it directs the search along promising complete paths rather than merely promising directions. Setting h to zero recovers uniform cost and setting g to zero recovers greedy search, which places the whole family on one axis and makes the comparison immediate.
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