funkcja wymierna doprowadź do najprostszej postaci wyrażenie
a)
b)
a) x² -14x +49 (x -7)² (x-7)² - (x-7) 7 -x
-------------- = ------------ = ---------------- = --------- = ------
49 - x² -(x² -49) - (x-7)(x+7) x +7 x+7
Zal. x ≠ -7 i x ≠ 7
b) x⁴ -1 3x² -3 (x² -1)(x² +1) 4x (x-1)(x+1)(x²+1) 4x
-------- : --------- = --------------- · ----------------- = ------------------ · ------------- =
2x² +2 4x 2(x² +1) 3(x² -1) 2(x² +1) 3(x-1)(x+1)
= ⅔x
Zal: x≠ 0 i x ≠ -1 i x ≠ 1
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a) x² -14x +49 (x -7)² (x-7)² - (x-7) 7 -x
-------------- = ------------ = ---------------- = --------- = ------
49 - x² -(x² -49) - (x-7)(x+7) x +7 x+7
Zal. x ≠ -7 i x ≠ 7
b) x⁴ -1 3x² -3 (x² -1)(x² +1) 4x (x-1)(x+1)(x²+1) 4x
-------- : --------- = --------------- · ----------------- = ------------------ · ------------- =
2x² +2 4x 2(x² +1) 3(x² -1) 2(x² +1) 3(x-1)(x+1)
= ⅔x
Zal: x≠ 0 i x ≠ -1 i x ≠ 1