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Which of the following expressions is a polynomial in x, even though one of its coefficients is irrational?निम्नलिखित में से कौन-सा व्यंजक x में एक बहुपद है, भले ही उसका एक गुणांक अपरिमेय है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(5x^3-\sqrt{2}x+7\)\(5x^3-\sqrt{2}x+7\)
In \(5x^3-\sqrt{2}x+7\), the powers of x are 3, 1, and 0, all non-negative integers. An irrational coefficient such as \(\sqrt{2}\) is allowed. Option B has \(x^{-1}\). Exam tip: check exponents of the variable, not the type of coefficient.\(5x^3-\sqrt{2}x+7\) में x की घातें 3, 1 और 0 हैं, जो सभी अशून्य पूर्णांक हैं। \(\sqrt{2}\) जैसा अपरिमेय गुणांक मान्य है। B में \(x^{-1}\) आता है। परीक्षा टिप: केवल चर की घातें जाँचें।
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