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प्रश्न
Multiply the following:
–7st, –1, –13st2
उत्तर
We have,
–7st, –1 and –13st2
∴ –7st × (–1) × (–13st2) = [–7 × (–1) × (–13)]st × (st2)
= – 91s2t3
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