Given the function f(x) = log5(x + 1), find the value of f-1(2).
Solution:
Given the function f(x) = log5(x + 1)
A Function in math is visualized as a rule, which gives a unique output for every input x.
The logarithm of any number N if interpreted as an exponential form, is the exponent to which the base of the logarithm should be raised, to obtain the number N.
Let y = f(x) = log5(x + 1),
ey = 5(x + 1)
ey / 5 = (x + 1)
(ey / 5) - 1 = x
y = f(x)
=> x = f-1(y)
f-1(2) = e2 / 5 - 1
f-1(2) = -0.55
Therefore, the value of f-1(2) for the function f(x) = log5(x + 1) is -0.55
Given the function f(x) = log5(x + 1), find the value of f-1(2).
Summary:
Given the function f(x) = log5(x + 1),the value of f-1(2) is -0.55.
Math worksheets and
visual curriculum
visual curriculum