Ответ:
6) (2a+2b)/b×(1/(a-b)-1/(a+b)=2(a+b)/b×2b/(a+b)(a-b)=4/(а-b)=4/0.1=40
7) (a²-4)/a×1/(a+2)-(a+2)/a=(a-2)/a-(a+2)/a=(a-2-a-2)/a=-4/a=-4/-0.5=8
8) x³+x-(x-2)(x²+2x+4)=x³+x-(x³-8)=x+8=8.0015
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Ответ:
6) (2a+2b)/b×(1/(a-b)-1/(a+b)=2(a+b)/b×2b/(a+b)(a-b)=4/(а-b)=4/0.1=40
7) (a²-4)/a×1/(a+2)-(a+2)/a=(a-2)/a-(a+2)/a=(a-2-a-2)/a=-4/a=-4/-0.5=8
8) x³+x-(x-2)(x²+2x+4)=x³+x-(x³-8)=x+8=8.0015