If satisfies

MATHEMATICS · Multi correct · A Level · Mathematics · Exponentials and logarithms · Exponentials and logarithms

Problem

If xx satisfies log⁡2(9x−1+7)=2+log⁡2(3x−1+1)\log_2(9^{x-1}+7)=2+\log_2(3^{x-1}+1), then (1) x∈Qx\in\mathbb{Q} (2) x∈Nx\in\mathbb{N} (3) x∈{x∈Q:x<0}x\in\{x\in\mathbb{Q}:x<0\} (4) x∈Nex\in N_e (set of even natural numbers)

Related theory

Browse the problem library