Question

tìm \(x\)

a.(3.\(x\)-1)³=125

b.15.(\(x\)+1)+35=2.10²

c.\(x\)ϵ\(Ư\)\(C\)(18,54)

❗lưu ý❗

1.mình cần gấp.

2.các làm từng bước.

Answer 1

\(a,\Rightarrow3x-1=5\\ \Rightarrow3x=6\\ \Rightarrow x=2\\ b,\Rightarrow15\left(x+1\right)=200-35=165\\ \Rightarrow x+1=11\\ \Rightarrow x=10\\ c,\Rightarrow x\inƯC\left(18,54\right)=Ư\left(18\right)=\left\{1;2;3;6;9;18\right\}\)