Question

Answer 1

Bài 3:

a: x=2/3+1/4=8/12+3/12=11/12

b: =>9^x*82=82

=>9^x=1

=>x=0

Answer 2

Bài 1:

Các số hữu tỉ: -12; -3,5; 0

Bài 2

a) 3/4 + 5/8 - 7/6

= 11/8 - 7/6

= 5/24

b) -23/7 . 3/10 + 13/7 . 3/10

= 3/10 . (-23/7 + 13/7)

= 3/10 . 10/7

= 3/7

c) (-5/6)⁶ . (6/5)⁸

= (5/6)⁶ . (6/5)⁶ . (6/5)²

= (5/6 . 6/5)⁶ . 36/25

= 1⁶ . 36/25

= 1 . 36/25

= 36/25