Question

CALCULATI PARTEA INTREAGA.VREAU SI CALCULUI VA ROG.
$[ \frac{7}{5 \sqrt{2}-1 }]=$

Answer 1

[7/5√2-1]=
Rationalizam:
[7(5√2+1)/(5√2-1)(5√2+1)]=
[7(5√2+1)/ (50-1)]
[7(5√2+1) / 49] =
[(5√2+1) / 7].
Stim ca :
1, 4 < √2 < 1,5
7 < 5√2 < 7,5 
8 < 5√2+1 < 8,5
1,14 < (5√2+1)/7 < 1,21 ⇒ [(5√2+1)/7]= 1
Sper ca te-am ajutat.