Question 971652
e^x + e^-x = 2

e^x + (1/e^x)=2

(e^2x + 1)/e^x =2

Multiply by e^x both sides

e^2x +1 =2 e^x
e^2x-2e^x+1=0
(e^x -1)^2 =0
e^x =1
x=0

check
1 +1 =2