csat-suneung 2010 Q4

csat-suneung · South-Korea · csat__math-humanities 3 marks Exponential Equations & Modelling Solve Exponential Equation for Unknown Variable

What is the sum of all real roots of the exponential equation $2 ^ { x } + 2 ^ { 2 - x } = 5$? [3 points]
(1) - 2
(2) - 1
(3) 0
(4) 1
(5) 2

What is the sum of all real roots of the exponential equation $2 ^ { x } + 2 ^ { 2 - x } = 5$? [3 points]\\
(1) - 2\\
(2) - 1\\
(3) 0\\
(4) 1\\
(5) 2