Question 42Let $D$ represent a repeating decimal. If $P$ denotes the $r$ figures of $D$ which do not repeat themselves, and $Q$ denotes the $s$ figures which do repeat themselves, then the incorrect expression is:$D=0.PQQQ\ldots$$10^rD=P.QQQ\ldots$$10^{r+s}D=PQ.QQQ\ldots$$10^r(10^s-1)D=Q(P-1)$$10^r\cdot10^{2s}D=$ $PQQ.QQQ\ldots$