Question
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(a + b)n के द्विपद प्रसरण में वह पद जो किसी चर में शामिल नहीं है, उसे स्वतंत्र पद कहा जाता है।
(a + b)n के द्विपद प्रसरण में सामान्य पद निम्न द्वारा ज्ञात किया जाता है:
गणना:
दिया गया है:
अर्थात्
माना कि (r + 1)वां पद स्वतंत्र पद है।
∵ (r + 1)वां पद स्वतंत्र पद है।
⇒ k = ± 3
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