Find the inverse of the function:
f(x) = e^(4x+2) - 10
y = e^(4x+2) - 10
y+10 = e^(4x+2)
4x+2 = ln(y+10)
x = (ln(y+10)-2)/4
so, f^-1(x) = (ln(x+10)-2)/4
f(x) = e^(4x+2) - 10
y+10 = e^(4x+2)
4x+2 = ln(y+10)
x = (ln(y+10)-2)/4
so, f^-1(x) = (ln(x+10)-2)/4