यदि (p(x)=mx+n), (p(-2)=5) और (p(3)=30), तो (m+n) क्या है?
If (p(x)=mx+n), (p(-2)=5) and (p(3)=30), what is (m+n)?
Explanation opens after your attempt
B. (15)
Concept
Subtracting the two values gives (5m=25), so (m=5). From (-2m+n=5), (n=15), so (m+n=20), not (15).
Why this answer is correct
The correct answer is B. (15). Subtracting the two values gives (5m=25), so (m=5). From (-2m+n=5), (n=15), so (m+n=20), not (15).
Exam Tip
दोनों मान घटाने पर (5m=25) से (m=5) मिलता है। (-2m+n=5) से (n=15), इसलिए (m+n=20) नहीं बल्कि (20) है।
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