Question

Select the correct PROLOG definition of powerof2/2, where powerof2(K,N) checks whether N is equal to 2K (A) powerof2(0,1);- !
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Answer #1

THE CORRECT OPTION IS:

(D) powerof2(K, P) :- K1 is K-1, powerof2(K1, P1), P is P1*2.

because it recursively does K-1 till it's 0 and then multiplies the base value by twice K times to check if it is P or not. If yes then returns true else false.

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