What will come in the place of question mark (?)
$$(a)^{c}\times(b)^a\times?=0$$, if a, b, c are not equal to 0.
RHS is 0. So, there has to be a 0 in LHS. $$a^c$$ and $$b^a$$ cannot be 0. So, '0' should come in place of the question mark.
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