Higher Secondary Question Paper Solution of Year 2018 Question No: A.2.(d)(i)
\(\overrightarrow a, \overrightarrow b \) ও \(\overrightarrow c \) ভেক্টর তিনটির মান যথাক্রমে 3, 4 এবং 5 ভেক্টর তিনটি এমন যে, প্রত্যেক ভেক্টর অন্য দুটি ভেক্টরের সমষ্টির উপর লম্ব । প্রমান করো যে \(| \overrightarrow a + \overrightarrow b + \overrightarrow c | = 5\sqrt 2\)
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