Which of the following is an odd function?
f(x) = x3 + 5x2 + x
f(x)= x
f(x) = x2 + x
f(x) = -X

incomplete question. how do you expect anyone to you when you do not post the question in its entirety?

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

d is ur answer hopes this i dont really know how to explain it to u.