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Which expression is not a polynomial in (x), even though it has real coefficients?कौन-सा व्यंजक (x) में बहुपद नहीं है, भले ही उसमें वास्तविक गुणांक हों?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (7x^2+\frac{4}{x}-9)(7x^2+\frac{4}{x}-9)
(\frac{4}{x}=4x^{-1}), where the power of (x) is negative. Having real coefficients alone does not guarantee a polynomial.(\frac{4}{x}=4x^{-1}) है, जिसमें (x) की घात ऋणात्मक है। वास्तविक गुणांक होना अकेले बहुपद की गारंटी नहीं देता।
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