यदि (p(x)=mx+n), (p(-1)=4) और (p(3)=20), तो (m+n) क्या है?
If (p(x)=mx+n), (p(-1)=4) and (p(3)=20), what is (m+n)?
Explanation opens after your attempt
C. (12)
Concept
Subtracting the two equations gives (4m=16), so (m=4). Then (-m+n=4) gives (n=8), so (m+n=12).
Why this answer is correct
The correct answer is C. (12). Subtracting the two equations gives (4m=16), so (m=4). Then (-m+n=4) gives (n=8), so (m+n=12).
Exam Tip
दोनों समीकरण घटाने पर (4m=16) से (m=4) मिलता है। फिर (-m+n=4) से (n=8) और (m+n=12) है।
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