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link : https://olm.vn/hoi-dap/detail/13491883964.html
hok tốt
aggg
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A=2008.2008=2.1004.2.1004=4.1004^2
B=2006.2010=2.1003.2.1005=4.1005.1003
ta có:1004^2>1003.1005
A>B
b)4835+90=47.102+41+90=47.102+131
47.36+50<4835+90
link tham khảo
link : https://olm.vn/hoi-dap/detail/13491883964.html
hok tốt
am
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link tham khảo
link : https://olm.vn/hoi-dap/detail/13491883964.html
hok tốt
n
link tham khảo
link : https://olm.vn/hoi-dap/detail/13491883964.html
hok tốt
alll
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1:a) A=2008.2008=2.1004.2.1004=4.
B=2006.2010=2.1003.2.1005=4.1005.1003
ta có:>1003.1005
A>B
b)4835+90=47.102+41+90=47.102+131
47.36+50<4835+90
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A = 2008 . 2008 = 2. 1004 .2. 1004 = 4 . 1004 ^ 2
B = 2006 . 2012 = 2 . 1005 . 2 . 1003 = 4 . 1005 . 1003
Ta có : 1004 ^ 2 > 1003 . 1005
A>B
Mình chỉ làm đc thế thôi !
-Học tốt-
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a) A = 2018.2018 - 2018.(2017+1) = 2018.2017 + 2018.
B = 2017.2019 = 2017.(2018+1) = 2017.2018 + 2017.
Vì 2018.2017 + 2018 > 2017.2018 + 2017 nên A > B.
b) A = 2019.2021 = (2018+1).2021 = 2018.2021 + 2021.
B = 2018.2022 = 2018.(2021+1) = 2018.2021+2018.
Vì 2018.2021+2021 >2018.2021+2018 nên A > B.
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a) A = 2018.2018 - 2018.(2017+1) = 2018.2017 + 2018.
B = 2017.2019 = 2017.(2018+1) = 2017.2018 + 2017.
Vì 2018.2017 + 2018 > 2017.2018 + 2017 nên A > B.
b) A = 2019.2021 = (2018+1).2021 = 2018.2021 + 2021.
B = 2018.2022 = 2018.(2021+1) = 2018.2021+2018.
Vì 2018.2021+2021 >2018.2021+2018 nên A > B
a) Ta có : A = 2020 . 2020 = 2020 ( 2018 + 2 )
= 2020 . 2018 + 2020 . 2
B = 2018 . 2022 = 2018 ( 2020 + 2 )
= 2018 . 2020 + 2018 . 2
Vì 2020 . 2 > 2018 . 2 nên A > B
b) Ta có : A = 47 . 36 + 53 = 47 ( 35 + 1 ) + 53
= 47 . 35 + 47 . 1 + 53
= 47 . 35 + 47 + 53
= 47 . 35 + 100
B = 48 . 35 + 90 = ( 47 + 1 ) . 35 + 90
= 47 . 35 + 1 . 35 + 90
= 47 . 35 + 35 + 90
= 47 . 35 + 125
Vì 100 < 125 nên A < B