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Question -

यदि  , तो |A| ज्ञात कीजिए।



Answer -

प्रथम पंक्ति के सापेक्ष प्रसार करने पर,

= [1 x (-9) – 4 x (-3)]– (1) [2x(-9) – 5x(-3)] + (-2)[2×4 – 5×1]
= 3 + 3 – 6
= 0

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