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JEE MAIN - Mathematics Hindi (2002 - No. 30)

यदि $$\left| {\overrightarrow a } \right| = 5,\left| {\overrightarrow b } \right| = 4,\left| {\overrightarrow c } \right| = 3$$ इस प्रकार $$\left| {\overrightarrow a .\overrightarrow b + \overrightarrow b .\overrightarrow c + \overrightarrow c .\overrightarrow a } \right|$$ का मान क्या होगा, दिया गया है कि $$\overrightarrow a + \overrightarrow b + \overrightarrow c = 0$$ :
$$25$$
$$50$$
$$-25$$
$$-50$$

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