\(ƯC\left(-15;+20\right)=\left\{\pm1;\pm5\right\}\)

ƯC của(−15;+20) là: {±1;±5}

đây là theo hiểu biết của mk thôi nha, ko chép ai đâu^^

\(=\left(\dfrac{1}{49}-\dfrac{1}{9}\right)\cdot...\cdot\left(\dfrac{1}{49}-\dfrac{1}{49}\right)\cdot...\cdot\left(\dfrac{1}{49}-\dfrac{1}{49^2}\right)=0\)

1. Energy consumption will be reduced as much as possible.
2. A lot of energy next century will be offered by wind power.
3. In the past, clothes were washed with my mother's hand. ;-;
4. Their house is decorated with beautiful Christmas trees.
5. Ann will be invited to the party by Bill.