Question

Answer 1

b. \(PTHDGD:\left(d_1\right)-\left(d_2\right)\)

\(-2x+5=x+2\)

\(\Rightarrow x=1\left(1\right)\)

\(Thay.\left(1\right)in\left(d_2\right):y=1+2=3\)

\(\Rightarrow M\left(1;3\right)\)

c. Ta có: \(a=1\)

\(\Rightarrow tan\alpha=\left|\alpha\right|=\left|1\right|=1\)

\(\Rightarrow\alpha=45^0\)

Answer 2

a)  ta có  :

 -2x+5= x+2     ⇒ x=1

Thay  x=1 vào pt (d2) ta có: y= 1+2 =3

⇒ M(1;3)

b)   Ta có hệ số góc : 1=tanα  ⇒α = 45^o