zad.13
Oblicz wartość wyrażenia dla
a= -1, b= -2/3, c= 0,5
b) 2a^2b+3ab^2-2bc+3ac-2a^2b-ac+3ab^2
2a²b + 3ab² - 2bc + 3ac - 2a²b - ac + 3ab² = 2·(-⅔) + (-3)·⁴/₉ + ⅔ - ³/₂ + ⁴/₃ + ½ - 3·(⁴/₉) =
-⁴/₃ - ⁴/₃ + ⅔ - ³/₂ + ⁴/₃ + ½ - ⁴/₃ = -2 - 1 = -3
2a^2b+3ab^2-2bc+3ac-2a^2b-ac+3ab^2=
=2*1*(-2/3)+3*(-1)*4/9-2* (-2/3)*0,5 + 3* (-1) * 0,5 -2*1*(-2/3)- (-1) * 0,5 + 3*(-1)*4/9=
=-4/3 - 4/3 + 4/3*1/2 - 1,5 +4/3 +0,5 - 4/3 =
=-4/3 - 4/3 +2/3 - 1,5 +4/3 +0,5 - 4/3 =
= -8/3 + 2/3 -1 =
=-6/3-1=
=-2-1= -3
Proszę bardzo ;))
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2a²b + 3ab² - 2bc + 3ac - 2a²b - ac + 3ab² = 2·(-⅔) + (-3)·⁴/₉ + ⅔ - ³/₂ + ⁴/₃ + ½ - 3·(⁴/₉) =
-⁴/₃ - ⁴/₃ + ⅔ - ³/₂ + ⁴/₃ + ½ - ⁴/₃ = -2 - 1 = -3
2a^2b+3ab^2-2bc+3ac-2a^2b-ac+3ab^2=
=2*1*(-2/3)+3*(-1)*4/9-2* (-2/3)*0,5 + 3* (-1) * 0,5 -2*1*(-2/3)- (-1) * 0,5 + 3*(-1)*4/9=
=-4/3 - 4/3 + 4/3*1/2 - 1,5 +4/3 +0,5 - 4/3 =
=-4/3 - 4/3 +2/3 - 1,5 +4/3 +0,5 - 4/3 =
= -8/3 + 2/3 -1 =
=-6/3-1=
=-2-1= -3
Proszę bardzo ;))