A = 3i - 4j and B = "-i" - 4j, calculate A+B and |Abar+Bbar|
Answers
Answered by
0
is
A
Along positive x axis
A
−
B
=3
i
^
−4
j
^
−(−
i
^
−4
j
^
)
=3
i
^
−4
j
^
+
i
^
+4
j
^
=4
i
^
∴ Direction of (
A
−
B
) is along positive X axis.
Answered by
2
Answer:
2i-8j , √68
Explanation:
Given A=3i-4j , B=-i-4j
A+B = 3i - 4j - i - 4j
=2i-8j
A+B = 2i-8j
therefore A+B = 2i-8j
|A+B| =√(2^2+(-8)^2)
=√4+64
=√68
therefore |A+B| = √68
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