Let →a,→b and →c be three unit vectors such that ∣∣∣→a−→b∣∣∣2+∣∣→a−→c∣∣2=8.Then ∣∣∣→a+2→b∣∣∣2+∣∣→a+2→c∣∣2 is equal to:

Let →a,→b and →c be three unit vectors such that ∣∣∣→a�

1.	Let →a,→b and →c be three unit vectors such that ∣∣∣→a−→b∣∣∣2+∣∣→a−→c∣∣2=8.Then ∣∣∣→a+2→b∣∣∣2+∣∣→a+2→c∣∣2 is equal to:
Answer» Let $\to a, \to b$ and $\to c$ be three unit vectors such that ${∣ ∣ ∣ \to a - \to b ∣ ∣ ∣}^{2} + {∣ ∣ \to a - \to c ∣ ∣}^{2} = 8.$ Then ${∣ ∣ ∣ \to a + 2 \to b ∣ ∣ ∣}^{2} + {∣ ∣ \to a + 2 \to c ∣ ∣}^{2}$ is equal to:

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Let →a,→b and →c be three unit vectors such that ∣∣∣→a−→b∣∣∣2+∣∣→a−→c∣∣2=8.Then ∣∣∣→a+2→b∣∣∣2+∣∣→a+2→c∣∣2 is equal to:

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