1. Doprowadź wyrażenia do najprostszej postaci:
a) ( x+1 )(x2 – x + 1) + (1- x)3 d) (x- 5)2 – 3x( x2 – 1)
b) (2x-1)3 – (x+2)2 e) (2+ x)3 + (x -4 )2
c) (x+3)3 – (x+5)(x-5)
2.Oblicz:
a) 2 ∙(0,3)-1 + 14 ∙81/3 – 12 ∙ 27 -1/3=
b) 1/2 ∙2162/3 + (5,27 -3)0 – 810,75∙(0,5)-1 =
c) 5log_92 + 2log_9〖1/4〗 =
d)〖 log〗_712 - log_72 =
e) 3log3 +2 log2 - log6 =
3. Oblicz:
a) |pierwiastek z 2 - 3 |= d) |3- π |π -3 |=
b) |1- pierwiastek z 3|=
c) |pierw. z 3-pierw z 7|= e) |1-pierw z 2| + |pierw3 pierw2 |=
najlepsze wynagraaadzam :)
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1.a) ( x+1 )(x^{2} – x + 1) + (1- x)=x^{3}-x^{2}+x+x^{2}-x+1=x^{3}+1
b) (2x-1)3 – (x+2)2 =4x^{2}-1-x^{2}+4=3x^{2}+3
c) (x+3)3 – (x+5)(x-5)= x^{3}+27-(x^{2}-5x+5x-25)=x^{3}+27-x^{2}+5x-5x-25=x^{3}+52-x^{2}
d)(x- 5)2 – 3x( x2 – 1)= x^{2}-25-3x^{3}+3x
e)(2+ x)3 + (x -4 )2=8+x^{3}+x^{2}-16=-8+x^{3}+x^{2}
2.a) 2 ∙(0,3)-1 + 14 ∙81/3 – 12 ∙ 27 -1/3=0,6-1+378-324-1/3=53,3
b) 1/2 ∙2162/3 + (5,27 -3)0 – 810,75∙(0,5)-1 =2162/6+1+1621,5-1= 360,3+1+1621,5-1=1981,8