Question

Bài 1 so sánh 

a) M = (-3)²⁰²⁰ -3²⁰²⁰ và 0

b) M = (-3)²⁰²¹ +3²⁰²⁰ và N = [ (-3)]⁰

Answer 1

`@` `\text {Ans}`

`\downarrow`

`a)`

Ta có: `2020` là lũy thừa bậc chẵn

`=>`\(\left(-3\right)^{2020}=3^{2020}\)

`M = `\(3^{2020}-3^{2020}=0\)

`=> 0 = 0`

`=> M = N`

`b)`

`M =`\(\left(-3\right)^{2021}+3^{2020}\)

`=`\(3^{2020}-3^{2021}\)

Vì \(3^{2021}>3^{2020}\)

`=>`\(3^{2020}-3^{2021}< 0\)

`N = [ (-3)]^0`

`= (-3)^0`

`= 1`

Vì `1 > 0`

`=> M < N.`

`@` `\text {Duynamlvhg}`

Answer 2

a: M=3^2020-3^2020=0

b: M=-3^2021+3^2020=-3^2020(3-1)=-3^2020*2<0

N=[(-3)]^0=1

=>M<N