Current location - Training Enrollment Network - Mathematics courses - Questions about mathematical vectors: OB vector =a times OA vector +b times OC vector. If AB and C are collinear, how to prove that a+b= 1? Ask for advice, be specific.
Questions about mathematical vectors: OB vector =a times OA vector +b times OC vector. If AB and C are collinear, how to prove that a+b= 1? Ask for advice, be specific.
By vector OB=a vector OA+b vector OC,
When a, b, C*** lines,
There is a real number n, so vector AB=n vector AC,
That is, vector OB- vector OA=n (vector OC- vector OA)