Đáp án + Giải thích các bước giải:
a, `x : (-1/3)^7 = (1/2)^3`
` x : (-1)/2187 = 1/8`
` x = 1/8 . (-1)/2187`
` x = -1/17496`
Vậy `x = -1/17496`
b, `x : (1/8)^4 = (1/2)^8`
` x = (1/2)^8 . (1/8^4)`
` x = (1/2)^8 . ((1/2)^3)^4`
`x = (1/2)^8 . (1/2)^12`
` x = (1/2)^(8 + 12)`
` x = (1/2)^20`
Vậy `x = (1/2)^20`
c, `x . (1/2)^17 = (1/4)^10`
` x = (1/4)^10 : (1/2)^17`
` x = ( (1/2)^2)^10 : (1/2)^17`
` x = (1/2)^20 : (1/2)^17`
` x = (1/2)^(20 - 17)`
` x = (1/2)^3`
` x = 1/8`
Vậy `x = 1/8`