Question

va rog ajutati ma ....... urgent ​

Answer 1

Răspuns:

Explicație pas cu pas:

$x=\sqrt{19:\frac{21-2}{9} }+ \sqrt{20:\frac{22-2}{9} }+\sqrt{21:\frac{23-2}{9} }+....+\sqrt{26:\frac{28-2}{9} }=\sqrt{19*\frac{9}{19} } +\sqrt{20*\frac{9}{20} } +\sqrt{21*\frac{9}{21} } +...+\sqrt{26*\frac{9}{26} }=8*\sqrt{9}=24$

Answer 2

Răspuns:

√19/2,(1)=√19/2,1/9=√19/(2*9+1)/9=√19/19/9=√9=3

√20/2,(2)=√20/(2,2/9)=√20/(2*9+2)=√20/20/9=√9=3

√21/2,(3)=√21/(2,3/9)=√21/(2*9+3)/9=√21/21/9=√9=3

.................................................................................................

√26/(2,(8))=√26/(2,8/9)=√26/(2*9+9)=√26/26/9=√9=3

Suma are 8 termeni=>

x=√19/2,(1)+√20/2,(2)+√21/2,(3)+...+√26/2,(8)=

3+3+3+....+3( de8 ori)=3*8=24∈N

Explicație pas cu pas: