Question

3^x+3^-x+1=4 помогите решить плз

Answer 1

3ˇx + 3ˇ(-x+1) = 4
3ˇx +3.3ˇ-x =4
3ˇx =z
zˇ2=4z+3=0
z1=3,z2=1
a)3ˇx=3, 3ˇx=3ˇ1, x=1
b)3ˇx=1, 3ˇx=3ˇ0, x=0