pricillagarcia2002
30.06.2019 •
Mathematics
If d subscript 1 baseline overscript right-arrow endscripts plus d subscript 2 baseline overscript right-arrow endscripts equals 7.0 d subscript 3 baseline overscript right-arrow endscripts, d subscript 1 baseline overscript right-arrow endscripts minus d subscript 2 baseline overscript right-arrow endscripts equals 1.0 d subscript 3 baseline overscript right-arrow endscripts and d overscript right-arrow endscripts subscript 3 baseline equals 2.1 i overscript ̂ endscripts plus 5.0 j overscript ̂ endscripts, then what are (a) the x component of d subscript 1 baseline overscript right-arrow endscripts, (b) the y component of d subscript 1 baseline overscript right-arrow endscripts, (c) the x component of d subscript 2 baseline overscript right-arrow endscripts, and (d) the y component of d subscript 2 baseline overscript right-arrow endscripts?
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Ответ:
Also, given that
Let
, and
, then
Also,
Part A:
Solving for (1) and (3), we have
Therefore, the x-component of is 7.8
Part B
Solving for (2) and (4), we have
Therefore, the y-component of is 16.8
Part C
Solving for (1) and (3), we have
Therefore, the x-component of is 5.2
Part D
Solving for (2) and (4), we have
Therefore, the y-component of is 11.2
Ответ:
The expression would be m-2