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Razvan03s
a fost răspuns

Calculati: A= 3/5x8 + 3/8x11 + 3/11x14 + ........... + 3/62x65.
MULTUMESC!!

Răspuns :

Renatemambouko
A= 3/5x8 + 3/8x11 + 3/11x14 + ........... + 3/62x65=
=1/5-1/8+1/8-1/11+1/11-1/14+....+1/62-1/65=
=1/5-1/65=
=(13-1)/65=12/65

3/5x8=1/5-1/8
3/8x11=1/8-1/11
3/11x14=1/11-1/14
.....
3/62x65=1/62-1/65
Danamocanu71
A=3/5·8 +3/8·11 +3/11·14 +......+3/62·65
A=3/5-3/8+3/8-3/11+3/11-3/14+......+3/62-3/65
A=3/5-3/65
A=39-3 /65
A=36/65

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