1. Oblicz.
a.)
b.) 2log - log5 + log 125
2. oblicz .
(-3-2
1.
a) ... = log3 (4,5 * 2) = log3 9 = log3 3^2 = 2 * log3 3 = 2 * 1 = 2
b) .... = hm brakuje liczby logarytmowanej w 1 logarytmie
2.
... = [ -(3 + 2√7) ]² - (3 - 2√7)² = (3 + 2√7)² - (3 - 2√7)² =
[ (3 + 2√7) - (3 - 2√7)] [ (3 + 2√7) - (3 - 2√7)] = [ 3 + 2√7 - 3 + 2√7] [ 3 + 2√7 + 3 - 2√7] =
[ 4√7] [ 6 ] = 4√7 * 6 = 24√7
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1.
a) ... = log3 (4,5 * 2) = log3 9 = log3 3^2 = 2 * log3 3 = 2 * 1 = 2
b) .... = hm brakuje liczby logarytmowanej w 1 logarytmie
2.
... = [ -(3 + 2√7) ]² - (3 - 2√7)² = (3 + 2√7)² - (3 - 2√7)² =
[ (3 + 2√7) - (3 - 2√7)] [ (3 + 2√7) - (3 - 2√7)] = [ 3 + 2√7 - 3 + 2√7] [ 3 + 2√7 + 3 - 2√7] =
[ 4√7] [ 6 ] = 4√7 * 6 = 24√7