# Mechanics M1- paralle vectorsWatch

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#1
given that c=3i+4j and d=i-2j , find

t if d-tc is parallel to -2i+3j

1) I did the sum and got
(1-3t)i + (-2-4t)

2)then
3(1-3t)=-2(-2-4t)
The answer I got is correct but i do not get the concept here(in the second part)
0
2 years ago
#2
(Original post by Rujin)
given that c=3i+4j and d=i-2j , find

t if d-tc is parallel to -2i+3j

1) I did the sum and got
(1-3t)i + (-2-4t)

2)then
3(1-3t)=-2(-2-4t)
The answer I got is correct but i do not get the concept here(in the second part)
Essentially take the gradients of two lines and make them equal to each other.

0
2 years ago
#3
(Original post by Rujin)
given that c=3i+4j and d=i-2j , find

t if d-tc is parallel to -2i+3j

1) I did the sum and got
(1-3t)i + (-2-4t)

2)then
3(1-3t)=-2(-2-4t)
The answer I got is correct but i do not get the concept here(in the second part)
Which exam board are you taking?

I'm sure this is M2 or just vector knowledge
0
#4
(Original post by Maths is Life)
Which exam board are you taking?

I'm sure this is M2 or just vector knowledge
Hey!
This is Edexcel A-levels Mathematics.
I am in the first year. :-)
0
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