Question

find the values of a,b and c,vrify that (a*b)*c=a*(b*c)where a=3/5,b= -1/7,c= -1/7

Answer 1

$(a*b)*c= (\frac{3}{5} *\frac{-1}{7})* \frac{-1}{7}= \frac{-3}{35} *\frac{-1}{7}= \frac{3}{245}....(1)$
$a*(b*c)= \frac{3}{5} *(\frac{-1}{7}* \frac{-1}{7})= \frac{1}{49}* \frac{3}{5}= \frac{3}{245}....(2)$
(1)=(2)
hence verified