Usuń niewymierność z mianownika :
a) 1+pierwiastek z 2
-------------------------- =
pierwiastek z 2 + 3
b) 1+pierwastek z 2
------------------------- =
4 - pierwiastek z 2
c) 1+pierwiastek z 2
---------------------------- =
4 pierwastek z 2
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a)
b)
c)
a) 1+pierwiastek z 2 1+√2 (1+√2)(√2-3) √2-3+2-3√2 -1- 2√2 1+2√2
-------------------------- = ----------- = ------------------ = -------------- = --------- = --------
pierwiastek z 2 + 3 √2 + 3 (√2 + 3)(√2 - 3) 2-9 -7 7
b) 1+pierwastek z 2 1+√2 (1+√2)( 4+√2) 4+√2+4√2+2 6+5√2
------------------------- = ------- = ---------------- = ---------------- = --------
4 - pierwiastek z 2 4-√2 ( 4-√2)( 4+√2) 16-2 14
c) 1+pierwiastek z 2 1+√2 (1+√2)(2√2) 2√2+4 2(√2+2) √2+2
---------------------------- =------- = --------------- = ---------- = ----------- = -------
4 pierwastek z 2 2√2 (2√2)(2√2) 4 · 2 8 4