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f:R--->R,f(x)=0,5x + 3.Sa se rezolve ecuatia 2f(x + 1) - 3f(x -1) = 7

Răspuns :

Miky93
2(0,5x+3)+1-  3(0,5x+3)-1=7
x+6+1-1,5x-9-1=7
0,5x-3=7
0,5x=3+7=10
0,5x=10
x=20
Denymileylill
2f(x+1)-3f(x+1) =>2[0.5x(x+1)]-3[0.5x(x+1)] =>2(0.5x^2+0.5)-3(0.5x^2+0.5) =>x^2+1-1.5x^2-1.5 => 0.5x^2-0.5

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