Question

Please answer the question from the attachment

Answer 1

Answer:

${3}^{x} + {3}^{ - x} - 2 = 0 \\ {3}^{x} = y \\ y + 1 \div y - 2 = 0 \\ {y}^{2} - 2y + 1 = 0 \\ y = 1 \\ {3}^{x} = 1 \\ x = 0$