If (a⃗+b⃗) is perpendicular to b⃗ and a⃗+2 b⃗ is perpendicular to a⃗,|a⃗|=a,|b⃗|=b, then (1) a=b ...

If (a⃗+b⃗) is perpendicular to b⃗ and a⃗+2 b⃗ is perpendicular to a⃗,|a⃗|=a,|b⃗|=b, then
(1) a=b
(2) a=2 b
(3) b=2 a
(4) a=b √(2)
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Sir app books meh se dehk ke slove karte ho kya 🤨