Tiêu đề Maths XI - Straigth lines - Point of Intersection .ppt.ppt ✅

STRAIGHT LINES

Proof The lines are not parallel ⇒ a1b2 ≠ a2b1 ⇒ Slopes are not equal. ⇒ a1b2-a2b1 ≠ 0 Let (α,β) be the point of intersection.