Câu 1
câu 2 :
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\(f\rightarrow b\rightarrow d\rightarrow c\rightarrow a\rightarrow e\)
1 If the teacher's question hadn't been difficult, I could have answered it
2 If he smokes, he will be weak
3 If you don't stop smoking, you won't finish the work on time
4 If you aren't careful, you will make a wrong decision
5 If today weren't cold, we would go swimming
6 If my sister weren't inexperienced, she had been offered the job
\(A=x^6-2x^4-2x^4+4x^2+2x^3-4x\\ A=x^3\left(x^3-2x\right)-2x\left(x^3-2x\right)+2\left(x^3-2x\right)\\ A=\left(x^3-2x\right)\left(x^3-2x+2\right)=3\left(3+2\right)=3\cdot5=15\\ B=x^5-2x^3+3x^3-6x-3x^2\\ =x^2\left(x^3-2x\right)+3\left(x^3-2x\right)-3x^2\\ =\left(x^3-2x\right)\left(x^2+3\right)-3x^2=3\left(x^2+3\right)-3x^2\\ =3x^2-3x^2+9=9\)
\(\sqrt{ds^{ }wdsd_{ }d_{ }dw^{ }^{ }w\dfrac{ }{ }ds\dfrac{ }{ }dw\sqrt[]{}w\sqrt[]{}\sqrt[]{}d\sqrt[]{}\sqrt[]{}d\sqrt[]{}wwww}\)
\(\dfrac{1}{R}=\dfrac{1}{R1}+\dfrac{1}{R2}+\dfrac{1}{R3}=\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{6}=1\Rightarrow R=1\Omega\)
\(\Rightarrow I=\dfrac{U}{R}=\dfrac{6}{1}=6A\)
Chọn B