Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 4 | E Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Need help with part e
Date Posted: 4 years ago
Views: 257
See 1 Answer
(3a+1 2b) and (a 4b) are parallel. They have the same direction but differ in magnitude.
Now (a 4b) = 2(½a 2b)
Compare this to (3a+1 2b), we can deduce that (a 4b) = 2(3a+1 2b)
Which means that (½a 2b) = (3a+1 2b)
so ½a = 3a + 1
3a - ½a = 0 - 1
5/2 a = -1
a = -2/5
As for b, any value is possible.
Now (a 4b) = 2(½a 2b)
Compare this to (3a+1 2b), we can deduce that (a 4b) = 2(3a+1 2b)
Which means that (½a 2b) = (3a+1 2b)
so ½a = 3a + 1
3a - ½a = 0 - 1
5/2 a = -1
a = -2/5
As for b, any value is possible.
360 Tutoring Program