Question

If h(x) = 5 + x and k(x)= 1/x, which expression is equivalent to (kxh)(X)?

Answer 1

It can be solve this in two ways,

1) as if the h(x) = 5x and 2) as if h(x) = 5 + x

1) If h(x) = 5x and k(x) = 1/x

Then (k o h) (x) = k ( h(x) ) = k(5x) = 1/(5x)

2) If h(x) = 5 + x and k (x) = 1/x

Then (k x h)(x) =k ( h(x) ) = k (5+x) = 1 / [5 + x]

1/(5+x) is the correct answer

Explanation: