A vector →d is equally inclined to three vectors →a=^i−^j+^k, →b=2^i+^j and →c=3^j−2^k. Let →x,→y,→z be three vectors in the plane of →a,→b;→b,→c;→c,→a, respectively. If →r=3→x+4→y+5→z, then the value of →d.→r is

A vector →d is equally inclined to three vectors →a=^i−^j+^k, �

1.	A vector →d is equally inclined to three vectors →a=^i−^j+^k, →b=2^i+^j and →c=3^j−2^k. Let →x,→y,→z be three vectors in the plane of →a,→b;→b,→c;→c,→a, respectively. If →r=3→x+4→y+5→z, then the value of →d.→r is
Answer» A vector $\to d$ is equally inclined to three vectors $\to a =^i -^j +^k, \to b = 2^i +^j$ and $\to c = 3^j - 2^k$ . Let $\to x, \to y, \to z$ be three vectors in the plane of $\to a, \to b; \to b, \to c; \to c, \to a$ , respectively. If $\to r = 3 \to x + 4 \to y + 5 \to z,$ then the value of $\to d . \to r$ is