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2009-12-17T19:39:04+01:00
Oblicz iloczyn a i b jeśli a = √3 - √2, a b = √2+√3.
a*b = (√3 - √2 ) (√2+√3 )
a*b = (√3 - √2 ) (√3+√2 )
a*b = (√3)² - (√2)²
a*b = 3 - 2
a*b = 1

Oblicz (2/3)do-4 - (7/4)do2 * 2.
(2/3)⁻⁴ - (7/4)⁴ =
= (3/4)⁴ - (7/4)⁴ =
=(81/256) - (2401/256)=
= -2320/256=
= - 145/16
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2009-12-17T20:02:52+01:00
A = √3 - √2, a b = √2+√3.
(√3 - √2)*(√2+√3)=√6+√9-√4-√6=3-2=1
(2/3)⁻⁴-(7/4)⁴=(3/2)⁴-(7/4)⁴=(81/16)-(2401/256)