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For which (k) will ((k-1)x^4+(k+2)x^3+7x-4) have degree (3)?किस (k) पर ((k-1)x^4+(k+2)x^3+7x-4) की घात (3) होगी?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (k=1)(k=1)
For degree (3), the (x^4) coefficient must be zero and the (x^3) coefficient must be non-zero. At (k=1), (k+2=3) is also non-zero.घात (3) के लिए (x^4) का गुणांक शून्य और (x^3) का गुणांक अशून्य होना चाहिए। (k=1) पर (k+2=3) भी अशून्य है।
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