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If (f(x)=2x-1) and (g(x)=x^2+1), what is the minimum value of ((f+g)(x))?यदि (f(x)=2x-1) और (g(x)=x^2+1) हों, तो ((f+g)(x)) का न्यूनतम मान क्या है?
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((f+g)(x)=x^2+2x=(x+1)^2-1), so the minimum is (-1). Be careful because (2x-1+x^2+1=x^2+2x).((f+g)(x)=x^2+2x=(x+1)^2-1) नहीं, सही योग (x^2+2x=x(x+2)) का न्यूनतम (-1) होता है। ध्यान दें (2x-1+x^2+1=x^2+2x)।
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