Since the number of negative terms in the product is odd. Therefore, their product is negative.
$9\times\Big(-\frac{1}{3}\Big)\times(-3)\times\Big(-\frac{1}{9}\Big)$
$=9\times\Big(-\frac{1}{9}\Big)\times\Big(-\frac{1}{3}\Big)\times(-3)$
$=-\Big(9\times\frac{1}{9}\times\frac{1}{3}\times3\Big)$
$=-(1\times1)$
$=-1$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.