The function f f\,f is defined by f(x)=e2xf(x) = e^{2x}f(x)=e2x for x∈Rx \in \mathbb{R}x∈R.
Find an expression for f−1(x)f^{-1}(x)f−1(x).
Tick one box.
f−1(x)=12lnxf^{-1}(x) = \frac{1}{2}\ln xf−1(x)=21lnx
f−1(x)=ln(x2)f^{-1}(x) = \ln\left(\frac{x}{2}\right)f−1(x)=ln(2x)
f−1(x)=2lnxf^{-1}(x) = 2\ln xf−1(x)=2lnx
f−1(x)=lnx−2f^{-1}(x) = \ln x - 2f−1(x)=lnx−2
281 exam-style questions on CCEA A Level Maths 3.1 Algebra and functions (A-level only), covering 3.1.1 Algebra and functions (A-level only), 3.1.2 Algebra and functions (A-level only), 3.1.3 Algebra and functions (A-level only), 3.1.4 Algebra and functions (A-level only), 3.1.5 Algebra and functions (A-level only), 3.1.6 Algebra and functions (A-level only), 3.1.7 Algebra and functions (A-level only), 3.1.8 Algebra and functions (A-level only), 3.1.9 Algebra and functions (A-level only), and 3.1 Algebra and functions (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.