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Tiffany2004
a fost răspuns

afla x stiind ca 9^x+1+9^x+9^x-1=91•3^14 va rogrezolvare completa repede

Răspuns :

Albatran
9 *9^x+9^x+9^x/9=91*3^14
9^x(9+1+1/9)=91*3^14
9^x * 91/9=91*3^14
9^x/9=3^14
 9^(x-1)=3^14

(3²)^(x-1)=3^14

3^ (2x-2)=3^14

2x-2=14
2x=16
x=8 cerinta

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