Free SAT Practice Question

Question 1 of 1
ID: SAT-PM-1
Section: Math - Passport to Advanced Math
Topic: Composite Functions
Difficulty level: Medium

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If $f(x)=x+1$ and $g(x)=x^2+1$, then what is the value of $f[g(x)]-g[f(x)]$? (without calculator)

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