(-3/4) (-4/7) (-2/3) = ?? (-2/3) (-3/4) (4/5) = ??

(2/3) (-9/10) (5/6) = ??

answer has to be a fraction

Step-by-step explanation:

2/5 và -1/2

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b