If f (a) = K, then which of the following must be true? f (K) = a f - 1 (K) = a f - 1 (a) = K

Step-by-step explanation:

given that f (a) = K

we have the options of

f (K) = a

f ⁻¹ (K) = a

f ⁻¹ (a) = K

Where f ⁻¹ denotes an inverse function.

If f (a) = K, then its reciprocate, f ⁻¹ (K) = a

because it is essentially undoing the original equation