A) (X + 2)4 + (X + 1)4 = 33 + 12 2B) (X - 2)6 + (X - 4)6 = 64

Bài 7: a) (x +

2

)

4

+ (x + 1)

4

= 33 + 12

2

b) (x - 2)

6

+ (x - 4)

6

= 64