Question

উৎপাদকে বিশ্লেষণ করাে
Product analysis
(i).
${x}^{3} + 2x + 1$
(ii).
${(a + b)}^{2} - 5a - 5b + 6$

(iii).
${a}^{2} + {b}^{2} - {c}^{2} - 2ab$
(iv).
$1 - {x}^{12}$
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Answer 1

Answer:

What we mean by a frictionless pulley is that the friction in the bearings of the pulley is negligible, and the pulley is free to rotate without any resistance. We don't mean that the friction between the string and the pulley surface is negligible.