Giúp mik vs ạ cảm ơn Question Giúp mik vs ạ cảm ơn in progress 0 Môn Toán Doris 4 years 2020-11-01T09:46:31+00:00 2020-11-01T09:46:31+00:00 2 Answers 66 views 0
Answers ( )
Đáp án:
Giải thích các bước giải:
`a)(2/5+3/4)^2`
`=(8/20+15/20)^2`
`=(33/20)^2`
`=1089/400`
`b)(1/6-5/4)^2`
`=(2/12-15/12)^2`
`=(-13/12)^2`
`=169/144`
`c)(45^10×5^20)/(75^10)`
`=(45^10×(5^2)^10))/(75^10)`
`=(45^10×25^10)/(75^10)`
`=(675^10)/(75^10)`
`=(675/75)^10`
`=9^10`
`d)((0,8)^5)/((0,4)^6)`
`=((2×0,4)^5)/((0,4)^5×0,4)`
`=(2^5×(0,4)^6)/((0,4)^5×0,5)`
`=(2^5)/0,4`
`=64/0,4`
`=260`
`e)(2^15×9^4)/(6^6×8^3)`
`=(2^15×(3^3)^4)/((2×3)^6×(2^3)^3)`
`=(2^15×3^12)/(2^6×3^6×2^9)`
`=(2^15×3^6×3^6)/(2^15×3^6)`
`=(1×1×3^6)/(1×1)`
`=3^6`
`=729`
CHÚC BẠN HỌC TỐT!!!