किस मान पर ((d+9)x-9+(d-4)x-6+19) की डिग्री (6) होगी?
For which value will the degree of ((d+9)x-9+(d-4)x-6+19) be (6)?
Explanation opens after your attempt
B. (d=-9)
Concept
For degree (6), the \(x^9\) term must vanish and the \(x^6\) term must remain. This condition holds at (d=-9).
Why this answer is correct
The correct answer is B. (d=-9). For degree (6), the \(x^9\) term must vanish and the \(x^6\) term must remain. This condition holds at (d=-9).
Exam Tip
डिग्री (6) के लिए \(x^9\) पद हटना चाहिए और \(x^6\) पद बचना चाहिए। (d=-9) पर यह शर्त पूरी होती है।
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