MathematicsHard202×since 2002Q5783The vector a→=−i^+2j^+k^\overrightarrow a = - \widehat i + 2\widehat j + \widehat ka=−i+2j+k is rotated through a right angle, passing through the y-axis in its way and the resulting vector is b→\overrightarrow bb. Then the projection of 3a→+2b→3\overrightarrow a + \sqrt 2 \overrightarrow b3a+2b on c→=5i^+4j^+3k^\overrightarrow c = 5\widehat i + 4\widehat j + 3\widehat kc=5i+4j+3k is :A6\sqrt66B23\sqrt33C1D32\sqrt22Check answerSkip