Vector question help (1 Viewer)

[randomuser246]

Can anyone help with these questions?

 

[jimmysmith560]

Would the following working help with Question 16?

 

[kendricklamarlover101]

for 15 sketch it out if it helps visualise the situation and use dot product
theres quite a few different ways u could do 16 but the most reasonable one imo is to also just sketch it out and get an inequality from that

Spoiler

(hypotenuse of a right angled triangle is bigger than any of the other 2 sides)

 

[scaryshark09]

solution for question 15

 

[liamkk112]

Can anyone help with these questions?
View attachment 41684

im bored so here u go for 17i:

and 17ii:


for 16, its a hsc question from 2022, so theres plenty of solutions online. that being said its the hardest vector q ive seen in ext 1 (in hsc) and i wouldnt be too stressed as its basically out of the syllabus

heres 15:


sorry if i got anything wrong, im rusty coz i havent done anything since hsc lol.

 

[randomuser246]

Thank you

for 15 sketch it out if it helps visualise the situation and use dot product
theres quite a few different ways u could do 16 but the most reasonable one imo is to also just sketch it out and get an inequality from that

Spoiler

(hypotenuse of a right angled triangle is bigger than any of the other 2 sides)

 

[randomuser246]

Thanks for the help

im bored so here u go for 17i:
View attachment 41686
and 17ii:
View attachment 41687

for 16, its a hsc question from 2022, so theres plenty of solutions online. that being said its the hardest vector q ive seen in ext 1 (in hsc) and i wouldnt be too stressed as its basically out of the syllabus

heres 15:
View attachment 41690

sorry if i got anything wrong, im rusty coz i havent done anything since hsc lol.