Question

Tìm x : 

\(\dfrac{1}{4}\) . \(\dfrac{2}{6}\) . \(\dfrac{3}{8}\) . \(\dfrac{4}{10}\) .  ....  . \(\dfrac{30}{62}\) . \(\dfrac{31}{64}\) 

Answer 1

`1/4. 2/6. 3/8. 4/10........ 30/62. 31/64=2^x`

`=>\underbrace{1/2. 1/2. 1/2. 1/2..............1/2}_{\text{30 số 2}}. 1/64=2^x`

`=>(1/2)^{30}.(1/2)^{6}=2^x`

`=>(1/2)^{36}=2^x`

`=>2^{-36}=2^x`

`=>x=-36`

Vậy `x=-36`

Answer 2

các bạn thêm bằng 2^x hộ mk nha , mk quên