Choánhxạtuyếntính f :R3 →R3 vàhaicơsởcủa R3 : B={b1 =(1,3,3),b2 =(−4,6,5),b3 =(1,2,2)}, C ={c1 =(2,4-+3,3),c2 =(−5,−1,−5),c3 =(1,0,1)}. Biết: f(b1)=(−5,6,4), f(b2)=(−8,5,2), f(b3)=(−9,−2,−5).
a. Tìmmatrận A=[f]E3 ,từđósuyrabiểuthứccủa f(x1,x2,x3). 1/2

b. Tìm ma trận [ f ]B .
c. Từ [f] ,hãytínhmatrận [f]C .
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d. Chovector x=(−2,3,n),hãytính [x]B vàsuyra [f(x)]C .

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

Questions 7-8. use the following table to answer. year 2006 2007 2008 2009 2010 2011 2012 2013 cpi 201.6 207.342 215.303 214.537 218.056 224.939 229.594 232.957 7. suppose you bought a house in 2006 for $120,000. use the table above to calculate the 2013 value adjusted for inflation. (round to the nearest whole number) 8. suppose you bought a house in 2013 for $90,000. use the table above to calculate the 2006 value adjusted for inflation. (round to the nearest whole number)