courtr51
courtr51
24-08-2016
Mathematics
contestada
Find a • b.
a = 4i + 3j, b = -4i + 4j
Respuesta :
caylus
caylus
24-08-2016
Hello,
I suppose a and b are vectors
and i and j unit's vectors
[tex]\vec{i}*\vec{i}=1\\ \vec{j}*\vec{j}=1\\ \vec{i}*\vec{j}=0\\ [/tex]
[tex]\vec{a}\ .\ \vec{b}=(4\vec{i}\ +3 \vec{j}).(-4\vec{i}\ +4 \vec{j})\\ =-16-3*4*0+4*4*0+12=-4[/tex]
Answer Link
VER TODAS LAS RESPUESTAS ( 96+ )
Otras preguntas
What factors make real estate asses hard to value? List which of the three levels of inputs you would need to apply to help find the asset valuation.
If a per - unit excise tax rate were to increase from 2 percent to 4 percent, the excess burden of the tax would quadruple ( increased four - fold )a. Trueb. Fa
The extreme divide between political parties, especially when it comes to voting and policy, is known as: a. Partisanship b. Lobbying c. Plurality d. Consensus
Fill in the blanks with the words given within the box. The soya bean has been known to the people of China, Japan, Manchuria and Korea since oriental times. Th
The heaviest invertebrate is the giant squid, which is estimated to have a weight of about 0.26 tons spread out over its length of 31 feet. What is its weight i
What is “the road not taken” about by Robert frost
Digital marketers and e-commerce analysts are often curious. What does curiosity enable them to do?o Seek out answers about people - what they want, how they th
If you want to determine the truth of constructive criticism, what are you determining? A. Completeness B. Consistency C. Accuracy D. Practicality
can u help me in this question please in this question please i just want to ensure if my ans is correct. and tell me please why is it the answer please.. :(
According to a recent study, what is the most recognized smell in the world?
