làm hộ mình 2 phép tính.
a) x : (-1/2) mũ 3 = -1/2
b) (3/4) mũ 5 . x = (3/4) mũ 7
làm hộ mình 2 phép tính. a) x : (-1/2) mũ 3 = -1/2 b) (3/4) mũ 5 . x = (3/4) mũ 7
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làm hộ mình 2 phép tính.
a) x : (-1/2) mũ 3 = -1/2
b) (3/4) mũ 5 . x = (3/4) mũ 7
Khải Quang
a) `x:(-1/2)^3=-1/2`
`↔x=(-1/2).(-1/2)^3`
`↔x=(-1/2)^4`
`↔x=1/16`
b) `(3/4)^5 . x=(3/4)^7`
`↔x=(3/4)^7:(3/4)^5`
`↔x=(3/4)^2`
`↔x=9/16`
Huy Gia
Đáp án:
`a)`
` x : (-1/2)^3 = -1/2`
` x = -1/2 * (-1/2)^3`
` x = (-1/2)^4 = (1/2)^4`
` x = 1^4/2^4 = 1/16`
`b)`
` (3/4)^5 * x = (3/4)^7`
` x= (3/4)^7 : (3/4)^5`
` x= (3/4)^2`
` x = 9/16`