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Question
p
+
q
+
r
=
0
হলে,
p
3
+
q
3
+
r
3
-এর মান কত ?
pqr
3 pqr
6 pqr
9 pqr
ANSWER : 2
Descrption
<p>a +b +c = 0</p><p>a +b = -c</p><p>(a +b)<sup>3</sup> = -c<sup>3</sup></p><p>a<sup>3</sup> +b<sup>3 </sup>+ 3ab(a+b) = -c<sup>3</sup></p><p>a<sup>3</sup> +b<sup>3 </sup>+ 3ab(-c) = -c<sup>3</sup></p><p>a<sup>3</sup> +b<sup>3 -</sup> 3abc = -c<sup>3</sup></p><p>a<sup>3</sup> +b<sup>3 </sup> + c<sup>3</sup> = 3abc</p><p>ans</p><p> </p><p> </p><p> </p>
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