2^2x-1:4=8^3 (x+2)^5=2^10
(-x+31)-39=-69
-121-(35-x)=50
2^2x-1:4=8^3 (x+2)^5=2^10
(-x+31)-39=-69
-121-(35-x)=50
Đáp án:
`2^(2x – 1) : 4 = 8^3`
`2^(2x – 1) : 4 = 512`
`2^(2x – 1) = 512 × 4`
`2^(2x – 1) = 2048`
`2^(2x – 1) = 2^11`
`⇒ 2x – 1 = 11`
`2x = 11 + 1`
`2x = 12`
`x = 12 : 2`
`x = 6`
Vậy `x = 6`
`(x + 2)^5 = 2^10`
`(x + 2)^5 = (2^2)^5`
`(x + 2)^5 = 4^5`
`⇒ x + 2 = 4`
`x = 4 – 2`
`x = 2`
Vậy `x =2`
`(-x + 31) – 39 = -69`
`-x + 31 = -69 + 39`
`-x + 31 = -30`
`-x = -30 – 31`
`-x = -61`
`x = 61`
Vậy `x = 61`
`-121 – (35 – x) = 50`
`35 – x = -121 – 50`
`35 – x = -171`
`x = 35 – (-171)`
`x = 35 + 171`
`x = 206`
Vậy `x = 206`
Đáp án:
Chi tiết ở dưới `downarrow`
Giải thích các bước giải:
`2^{2x-1}:4=8^3`
`->2^{2x-1}=8^3.4`
`->2^{2x-1}=2^{9}.2^2`
`->2^{2x-1}=2^11`
`->2x-1=11`
`->2x=12`
`->x=6`
Vậy `x=6`
`(x+2)^5=2^10`
`->(x+2)^5=(2^2)^5`
`->x+2=2^2`
`->x+2=4`
`->x=2`
Vậy `x=2`
`(-x+31)-39=-69`
`->(-x+31)=-69+39`
`->-x+31=-30`
`->-x=-61`
`->x=61`
Vậy `x=61`
`-121-(35-x)=50`
`->35-x=-121-50`
`->35-x=-171`
`->x=35+171`
`->x=206`
Vậy `x=206`