ভেক্টর রাশি-৪

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\(\vec{A}=(px+y)\hat{i}+(y-2z)\hat{j}+(x+3z)\hat{k}\) ভেক্টরটি সলিনয়ডাল হবে যদি \(P=\)
[ বঃ ২০১৭ ]

\(2\)
\(4\)
\(3\)
\(-4\)
উপরের কোনোটিই নয়

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Ans: \(-4\)
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