Oblicz:
poprawny wynik to 2
tylko ma być uzasadnione dlaczego tak wyszło, np.:
log3 243=5, bo =243
... = log√5 (5 * 5^(1/3)) = log√5 [ 5^(4/3) ] = log√5 [ 5^(1/2)^(8/3) ] = log√5 (√5)^(8/3) = 8/3 * log√5 √5 = 8/3 * 1 = 8/3 = 2 i 2/3
lub 2 sposób
log√5 5∛5 = x
√5^x = 5 * 5^(1/3)
5^(1/2x) = 5^(4/3)
1/2x = 4/3
x = 4/3 * 2/1
x = 8/3
x = 2 i 2/3
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... = log√5 (5 * 5^(1/3)) = log√5 [ 5^(4/3) ] = log√5 [ 5^(1/2)^(8/3) ] = log√5 (√5)^(8/3) = 8/3 * log√5 √5 = 8/3 * 1 = 8/3 = 2 i 2/3
lub 2 sposób
log√5 5∛5 = x
√5^x = 5 * 5^(1/3)
5^(1/2x) = 5^(4/3)
1/2x = 4/3
x = 4/3 * 2/1
x = 8/3
x = 2 i 2/3