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f(x)=2x-3 f(x)-f(-2)=0

Răspuns :

f(x)= 2x - 3
f(- 2) = 2 · (-2) - 3 = -4 - 3 = -7
f(x)-f(-2) = 0
⇒ 2x - 3 - (-7) = 0
2x - 3 + 7 = 0
2x = 3 - 7
2x = -4 ⇒ x = -4 / 2 => x = -2
f ( x ) = 2x - 3
f ( - 2 ) = 2 · ( -2 ) - 3 = -4 - 3 = -7
f ( x ) - f ( - 2 ) = 0
⇒ 2x - 3 - ( - 7 ) = 0
2x - 3 + 7 = 0
2x = 3 - 7
2x = -4 ⇒ x = -4 / 2 ⇒ x = -2