d) (2x +1/ 2x -1 - 2x -1/ 2x +1) :4x/ 10x -5 .
Giải thích
d) 2x+12x−1−2x−12x+1:4x10x−5
=(2x+1)2−(2x−1)2(2x+1)(2x−1) . 10x−54x
=(2x+1+2x−1)(2x+1−2x+1)2x+1 . 54x
=4x . 22x+1 . 54x=102x+1.
d) 2x+12x−1−2x−12x+1:4x10x−5
=(2x+1)2−(2x−1)2(2x+1)(2x−1) . 10x−54x
=(2x+1+2x−1)(2x+1−2x+1)2x+1 . 54x
=4x . 22x+1 . 54x=102x+1.