Question

2^(x+2)+2^(x+1)-2^x=40
Log1/2(2x-1)+Log1/2(5)=log1/2(x)
log3(x^2) 5^4x-2>=25^x-7

Answer 1

2^(x+2)+2^(x+1)-2^x=40(x+2)+(x+1)-x=40
x+x-x=40-2-1
x=37