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cineva ma ajuta? multumesc!

Cineva Ma Ajuta Multumesc class=

Răspuns :

3a-5+3(a+1)-5=10

3a-10+3a+3=10

6a=17

a=17/6

f(a)=3a-5
f(a+1)=3(a+1)-5=3a-2
3a-5+3a-2=10
6a=10+7
6a=17
a=17/6