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If (U(t)=64-4t), when will (U(t)=28)?यदि (U(t)=64-4t), तो (U(t)=28) कब होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(t=9\)\(t=9\)
Given \(U(t)=64-4t\), set \(U(t)=28\): \(64-4t=28\). Thus, \(4t=36\), so \(t=9\). For example, at \(t=8\), \(U(8)=32\), not 28. Exam tip: substitute your final value back into the original expression to verify it.दिया है \(U(t)=64-4t\)। \(U(t)=28\) रखने पर \(64-4t=28\) मिलता है। अतः \(4t=36\), इसलिए \(t=9\)। \(t=8\) लेने पर \(U(8)=32\) होगा, जो 28 नहीं है। परीक्षा में मान रखने के बाद अंतिम उत्तर को मूल व्यंजक में जाँच लें।
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