Question

Va rog sa ma ajutati la ex 2 subpct-ul a. M-ar ajuta mult.

Answer 1

a) f(x)=ax+b - functia de gradul I
f(2x+3)=a(2x+3)+b
f(x-2)=a(x-2)+b
a(2x+3)+b - 2a(2x+3) - b = 26
2ax+3a+b-4ax-6a-b=26  // se reduce b. deci b=0;
-2ax-3a=26
a(-2x-3)=26  ==> -2x-3=26 ==> -2x=29 ==> x=-29/2
a=26/(-2x-3)
a=26/(29-3)
a=26/26
a=1.   Daca a=1 si b=0... f(x)=x