math question please !

[shamawi]

http://www.xtremepapers.me/CIE/Cambridg ... _qp_22.pdf
Q 7
anyone?

 

[TSZ]

AB=CD
a+tb=a+(3t-5)b
tb=a-a+3tb-5b
5b=3tb-tb
5b=2tb
5b-2tb=0
b(5-2t)=0
5-2t=0
5=2t
5/2=t
so, t=2.5
i hope i helped, if u have any difficulty, feel free to ask...

 

[shamawi]

thank you very much

 

[TSZ]

no prob