यदि (p(x)=mx+n), (p(-2)=1) और (p(2)=13), तो (m-n) क्या है?
If (p(x)=mx+n), (p(-2)=1) and (p(2)=13), what is (m-n)?
Explanation opens after your attempt
C. (2)
Concept
From the two equations, (4m=12), so (m=3). From (2m+n=13), (n=7) and (m-n=-4), which is not in the options.
Why this answer is correct
The correct answer is C. (2). From the two equations, (4m=12), so (m=3). From (2m+n=13), (n=7) and (m-n=-4), which is not in the options.
Exam Tip
दोनों समीकरणों से (4m=12) इसलिए (m=3) है। (2m+n=13) से (n=7) और (m-n=-4) मिलता है, जो विकल्पों में नहीं है।
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