1)Wyznacz , A/B i B\A, wiedząc żę :
A={0,1,2,5} i B={0,1,2,5,6,8}
2) Dla A=<-5; 4) i B=(-1;2> wyznacz , A/B i B\A
3)Przedstaw wyrażenia w postaci jak najprostrzej sumy algebraicznej
a) (4m-2n)(3m-5n)
b)(a-)(b+)
c)5-(2-*x+-+-)(x--
4)Uprość wyrażenie
a)
b)
5)Zapisz w jak najprostrzej postaci:
a)+4
b)+
c)-
d)+
6)Zapisz w postaci potęgi liczby 7:
a)
b)
c)
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z.1
A = { 0,1,2,5} , B = { 0,1,2,5,6,8 }
A u B = { 0,1,2,5,6,8 } = B
A n B = { 0,1,2,5 } = A
A \ B = zbiór pusty
B \ A = { 6,8 }
=================
z.2
A = < - 5; 4 ) , B = ( -1 ; 2 >
A u B = < - 5; 4 ) = A
A n B = ( - 1 ; 2 > = B
A \ B = < - 5 ;-1> u (2 ; 4 )
B \ A = zbiór pusty
====================
z.3
a)
( 4m - 2n)*(3m - 5n) = 4m*3m - 4m*5n - 2n*3m + 2n*5n =
= 12m^2 - 20mn - 6 mn + 10n^2 = 12 m^2 - 26 mn + 10 n^2
----------------------------------------------------------------------------
b)
( a - p(2))*( b + p(2)) = ab + a p(2) - b p(2) - 2 = ab + ( a - b) p(2) - 2
---------------------------------------------------------------------------------------
c)
Niezbyt czytelnu zapis
z.4
a) (1 -2x)*(1 + 2x) - [ (2y - x p(2))^2]/ 2 =
= 1 ^2 - (2x)^2 - [ 4 y^2 - 4 p(2) xy + 2 x^2]/2 =
=1 - 4 x^2 - ( 2 y^2 - 2 p(2) xy + x^2 ) =
= 1 - 4 x^2 - 2 y^2 +2 p(2) xy - x^2 =
= 1 - 5 x^2 +2 p(2) x y - 2 y^2
-----------------------------------
b)
( - y - p(7))^2 - (2 x^2 - 7y)*(7y -2 x^2) =
= y^2 + 2 p(7) y + 7 - ( 14 x^2 y - 4 x^4 - 49 y^2 + 14 x^2 y ) =
= y^2 + 2 p(7) y + 7 - 28 x^2 y - 4 x^2 - 49 y^2 =
= - 28 x^2 y -4 x^2 - 48 y^2 + 2 p(7) y + 7
-----------------------------------------------------------
z.5
a)
p(18) + 4 p(2) = p(9*2) + 4 p(2) = p(9)*p(2) + 4 p(2) = 3 p(2) + 4 p(2) = 7 p(2)
b)
p(48) + p(27) = p(16*3) + p(9*3) = p(16)*p(3) + p(9)*p(3) = 4 p(3) + 3 p(3) = 7 p(3)
c)
p3st(147) - p(75) = p3st( 49*3) - p(25*3) = p3st(49)*p3st(3) - p(25)*p(3) =
= p 3st(49)*p3st(3) - 5 p(3)
d)
p3st(32) + p3st( - 108) = p3st(8*4) + p3st(- 27*4) =
= p3st(8)*p3st(4) + p3st( -27)*p3st(4) = 2 p3st(4) - 3 p3st(4) = - p3st(4)
==================================================================
z.6
a) ( 7 p(7))^2 = 7^2 * 7 = 7^3
b) 7 p3st(7)*( p3st(7))^2 = 7 * ( p3st(7))^3 = 7*7 = 7^2
c) p [ 7 p3st( (7^6)^2 )] = p [ 7 *p3st (7^12)] = p[ 7* p3st ( 7^4)^3)] =
= p [ 7* 7^4 ] = p[ 7^5] = [(7^5)^(1/2) = 7^(5/2)
==============================================
p(7) - pierwiastek drugiego stopnia z 7
p3st (7^12) - pierwiastek 3 stopnia z ( 7 ^ 12 )