Question

va rogg kmi trebuie rapiddd​

Answer 1

Răspuns:

Explicație pas cu pas:

Calculam diferente de fractii cu acelasi numitor:

a)x=4/3+5/4+.....+51/50

y=1/3+1/4+.........+1/50

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

x-y=(4/3-1/3)+(5/4-1/4)+.........+(51/50-1/50)=1+1+1+......+1 =47

b)

x-y=(17/5-7/5)+(20/6-8/6)+.......+(92/30-32/30)=10/5+12/6+.....+60/30=

=2+2+....+2=2·25=50