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CBSE Class 12 Math 2019 All India Set 1 Solved Paper

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Question : 22 of 29
Marks: +1, -0
Let a→,b→\overset{\rightarrow}{a}, \overset{\rightarrow}{b} and c→\overset{\rightarrow}{c} be three vectors such that ∣a→∣=1,∣b→∣=2\left|\overset{\rightarrow}{a}\right|=1,\left|\overset{\rightarrow}{b}\right|=2 and ∣c→∣=3\left|\overset{\rightarrow}{c}\right|=3. If the projection of b→\overset{\rightarrow}{b} along a→\overset{\rightarrow}{a} is equal to the projection of c→\overset{\rightarrow}{c} along a→\overset{\rightarrow}{a}; and b→,c→\overset{\rightarrow}{b}, \overset{\rightarrow}{c} are perpendicular to each other, then find ∣3a→−2b→+2c→∣\left|3 \overset{\rightarrow}{a}-2 \overset{\rightarrow}{b}+2 \overset{\rightarrow}{c}\right|
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