यदि (Q(t)=210-7t), तो (Q(3)+Q(15)) किस एक (Q(k)) के दोगुने के बराबर है?
If (Q(t)=210-7t), (Q(3)+Q(15)) is equal to twice which (Q(k))?
Explanation opens after your attempt
B. (Q(9))
Concept
In a linear model the midpoint of (3) and (15) is (9). Therefore (Q(3)+Q(15)=2Q(9)).
Why this answer is correct
The correct answer is B. (Q(9)). In a linear model the midpoint of (3) and (15) is (9). Therefore (Q(3)+Q(15)=2Q(9)).
Exam Tip
रेखीय मॉडल में (3) और (15) का मध्य (9) है। इसलिए (Q(3)+Q(15)=2Q(9)) होता है।
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