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y = x² - 2x + 1
x² - 2x + 1 - y = 0
rumus ABC
2 +- √4 - 4 + 4y / 2 = 2 +- √4y / 2 = x
ubah x menjadi y begitu sebaliknya
karena x ≥ 1 maka pilih yg +
2 + √4x / 2 = 1 + (√4x/2) = y
f^-1(x) = 1 + (√4x/2)
f^-1(x) = 1 + (√4x/√4)
f^-1(x) = 1 + √x
kolom komentar tersedia jika ingin bertanya :)