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SAU_16-17
HSC - উচ্চতর গণিত ১ম পত্র
→
অধ্যায়-০২ঃ ভেক্টর (HSC - গণিত)
→
ডট গুণন
a
=
2
i
^
+
j
^
+
k
^
,
a=2 \hat{i}+\hat{j}+\hat{k},
a
=
2
i
^
+
j
^
+
k
^
,
b
=
i
^
−
j
^
+
k
^
b=\hat{i}-\hat{j}+\hat{k}
b
=
i
^
−
j
^
+
k
^
এবং
c
=
i
^
+
j
^
−
k
^
c=\hat{i}+\hat{j}-\hat{k}
c
=
i
^
+
j
^
−
k
^
হলে
a
⋅
b
+
b
a \cdot b+b
a
⋅
b
+
b
⋅
c
+
c
\cdot c+c
⋅
c
+
c
⋅
a
=
?
\cdot a=?
⋅
a
=
?
A.
0
0
0
B.
1
1
1
C.
2
2
2
D.
3
3
3
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