Given f(x)=2x and g(x)=x^2, evaluate : 1. f[g(3)] 2. g[f(3)] How do I solve 1. and 2. ?

1 Answer
Mark D.
May 11, 2018
  1. #f[g(3)]=18#

2.#g[f(3)]= 36#

Explanation:

If #f(x)=2x and g(x)=x^2# to solve #f[g(3)]# we put the value of 3 into #g(x)# and then put the answer into #f(x)#

  1. #f[g(3)]=> 3^2=9,=> 2 xx 9 =18#

2.#g[f(3)]=> 2 xx 3 = 6, =>6^2=36#

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