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If (K(t)=210-7t), what is (K(2t)-K(5t))?यदि (K(t)=210-7t), तो (K(2t)-K(5t)) क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(21t\)\(21t\)
Given \(K(t)=210-7t\), \(K(2t)=210-7(2t)=210-14t\) and \(K(5t)=210-7(5t)=210-35t\). Therefore, \(K(2t)-K(5t)=(210-14t)-(210-35t)=21t\). \(35t\) is only the term subtracted in \(K(5t)\), not the difference between the two function values. Exam tip: evaluate each input separately and retain brackets while subtracting.दिया है \(K(t)=210-7t\)। अतः \(K(2t)=210-7(2t)=210-14t\) और \(K(5t)=210-7(5t)=210-35t\)। इसलिए \(K(2t)-K(5t)=(210-14t)-(210-35t)=21t\)। \(35t\) केवल \(K(5t)\) में घटने वाला पद है, दोनों फलनों का अंतर नहीं। परीक्षा टिप: पहले प्रत्येक इनपुट का मान अलग-अलग रखकर कोष्ठक सहित घटाएँ।
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