Question

va rog repede repede​

Answer 1

[(7/9+77/99+777/999):7/9-111/700: (1/7+1/70+1/700)]^n=8

[(777/999+777/999+777/999)×9/7-111/ 700:(100/700+10/700+1/700)]^n=8

(3×777/999×9/7-111/700×700/111)^n=8

(3×111/111-1)^n=8

(3×1-1)^n=8

(3-1)^n=8

2^n=8=>n=3

Answer 2

Răspuns:

simplificam cu 11si 111; amplificam cu100 ;10 ;                                                          [(7/9+7/9+7/9) .9/7-111/700:(100/700+10/700+1/700)]ⁿ =[3-111/700 .700/111]ⁿ=        (3-1)ⁿ=2ⁿ  ;  2ⁿ=8=2³ ;   n=3

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