If vectors x2^i+3^j+^k and ^i−x^j−(2m−9)^k makes acute angle for all values of x∈R, then the number of non-negative integral value(s) of m is

If vectors x2^i+3^j+^k and ^i−x^j−(2m−9)^k makes acute angle for

1.	If vectors x2^i+3^j+^k and ^i−x^j−(2m−9)^k makes acute angle for all values of x∈R, then the number of non-negative integral value(s) of m is
Answer» If vectors $x^{2}^i + 3^j +^k$ and $^i - x^j - (2 m - 9)^k$ makes acute angle for all values of $x \in R,$ then the number of non-negative integral value(s) of $m$ is

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If vectors x2^i+3^j+^k and ^i−x^j−(2m−9)^k makes acute angle for all values of x∈R, then the number of non-negative integral value(s) of m is

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