Find f1a for the function f and real number a fx x3 3x 1 a

Find

f¹(a)

for the function f and real number a.

f(x) = x³ + 3x 1

a = 3

f¹(3) =

Solution

given function f(x) = x^3+ 3x -1

a is real number suchthat 1(a) = 1*3 = 3

therefore

f-1(3) = f-3 = x^3+ 3x -1-3 = x^3 + 3x - 4