Please tolong jawab soal no 18-19????​

Jawaban:

limit subsitusi

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18). lim x → 2

= (x² – 5x + 3)

lim x → 2

= (2² – 5(2) + 3))

= (4 – 10 + 3)

= -3 (D)

19). f(x) = 3x + 1 dan g(x) = x² – 2x + 3

lim x → -2

= 2f(x) + 3g(x)

= 2(3x + 1) + 3(x² – 2x + 3)

= 6x + 2 + 3x² – 6x + 9

= 3x² + 11

lim x → -2

= 3(-2)² + 11

= 3(4) + 11

= 12 + 11

= 23