Let f:[-oo,0)->(1,oo) be defined as f(x)...

Let f:[-oo,0)->(1,oo) be defined as `f(x)=(1+sqrt(-x))-(sqrt(-x)-x)` then f(x) is (A) injective but not surjective (B) injective as well as surjective (C) neither injective nor surjective (D) surjective nut not injective

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