Tìm xEZ: a)2^x+2^x+1+2^x+4=168
b)2^x+1.3^x+1=12^100:2^100
c)15^x-3:3^x-3=625^7.5^20
Loga
Toán lớp 7
Tìm xEZ: a)2^x+2^x+1+2^x+4=168
b)2^x+1.3^x+1=12^100:2^100
c)15^x-3:3^x-3=625^7.5^20
