jawab yah teman teman yg baik hati
[tex](f \: o \: g)(x) = f(g(x)) \\ 2 {x}^{2} - 4x + 3 = f(x - 1)[/tex]
Misalkan x - 1 = a, maka x = a + 1
[tex]2 {a}^{2} - 4a + 3 = f(a) \\ 2( {a + 1)}^{2} - 4(a + 1) + 3 = f(a + 1) \\2( {a}^{2} + 2a + 1) - 4a - 4 + 3 = f(a + 1) \\ 2 {a}^{2} + 4a + 2 - 4a - 4 + 3 = f(a + 1) \\ 2 {a}^{2} + 1 = f(a + 1) \\ 2 {x}^{2} + 1 = f(x)[/tex]
Jadi jawabannya adalah 2x² + 1 (D.)
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