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a fost răspuns

aflati numarul natural a ,unde a=(2/1*3+2/3*5+...2/27*29)*29/14

Răspuns :

Renatemambouko
a=(2/1*3+2/3*5+...2/27*29)*29/14 =
2/1*3=1/1-1/3
2/3*5=1/3-1/5
2/27*29=1/27-1/29
=(1/1-1/3+1/3-1/5+...+1/27-1/29)*29/14=
=(1/1-1/29)*29/14=
=(29-1)/1*29  *29/14=
=28/29 *29/14=28/14=2



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