Browse · MATH Print → jmc algebra junior Problem Let f(x)=x∣x∣. Find f−1(4)+f−1(−100). Solution — click to reveal We can write f(x) as follows: f(x)=⎩⎨⎧x20−x2if x>0,if x=0,if x<0.Hence, f−1(4)+f−1(−100)=2+(−10)=−8. Final answer -8 ← Previous problem Next problem →