Show that the vectors # 4 bb ul a - 8bb ul b# and #-26bb ul a+52bb ul b # are parallel?
1 Answer
Dec 28, 2017
Explanation:
Let us assume that the vectors
# bb ul u = lamda bb ul v#
And using the definitions of
# 4 bb ul a - 8bb ul b = lamda(-26bb ul a+52bb ul b) #
# 4 bb ul a - 8bb ul b = -26lamdabb ul a+52lamdabb ul b #
Equating coefficients of
# 4 \ \ \ = -26 lamda => lamda =- 2/13#
# -8 = 52 lamda \ \ \ \ => lamda = -2/13#
Hence we have found a suitable
# bb ul u = lamda bb ul v#
Hence