1. 3^x+1=27^x-1 2. 0.2^x^2+4x-5=1 3. 2^x+3-2^x+1=12 4. 4*2^2x-5*2^x+1=0

Question

1. 3^x+1=27^x-1
2. 0.2^x^2+4x-5=1
3. 2^x+3-2^x+1=12
4. 4*2^2x-5*2^x+1=0

Answer 1

(x − 1)^3 = 27.(x − 1)^3 = 3^3x - 1 = 3x = 4