If (K(t)=350-10t), what is (K(3t)-K(7t))?यदि (K(t)=350-10t), तो (K(3t)-K(7t)) क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(40t\)\(40t\)
Given \(K(t)=350-10t\), we get \(K(3t)=350-10(3t)=350-30t\) and \(K(7t)=350-10(7t)=350-70t\). Therefore, \(K(3t)-K(7t)=(350-30t)-(350-70t)=40t\). The term \(70t\) occurs in \(K(7t)\), but it is not the difference between the two function values. Exam tip: when the input is \(3t\) or \(7t\), substitute the complete input in place of \(t\).दिया है \(K(t)=350-10t\)। अतः \(K(3t)=350-10(3t)=350-30t\) और \(K(7t)=350-10(7t)=350-70t\)। इसलिए \(K(3t)-K(7t)=(350-30t)-(350-70t)=40t\)। विकल्प \(70t\) केवल \(K(7t)\) में घटने वाला पद है, दोनों मानों का अंतर नहीं। परीक्षा टिप: फलन में \(3t\) या \(7t\) रखने पर पूरे इनपुट को \(t\) के स्थान पर प्रतिस्थापित करें।
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