Question

Bài 1 : Chứng minh rằng ; 

99⁵ - 98⁴ + 97³ - 96² chia hết 10

Answer 1

99⁵ - 98⁴ + 97³ - 96²

= 99⁴ . 99 - (...6) + (...3) - (...6)

= (...1) . 99 - (...6) + (...3) - (...6)

= (...9) - (...6) + (...3) - (...6)

= (...3) + (...3) - (...6)

= (...6) - (...6) = (...0) chia hết cho 10

Chứng tỏ 99⁵ - 98⁴ + 97³ - 96² chia hết cho 10

Answer 2

99⁵ - 98⁴ + 97³ - 96²

= 99⁴ . 99 - (...6) + (...3) - (...6)

= (...1) . 99 - (...6) + (...3) - (...6)

= (...9) - (...6) + (...3) - (...6)

= (...3) + (...3) - (...6)

= (...6) - (...6) = (...0) chia hết cho 10

Chứng tỏ 99⁵ - 98⁴ + 97³ - 96² chia hết cho 10

 mk nha