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If (f(x)=x^2-4x+4) and (g(x)=2x-5), what is the minimum value of ((f+g)(x))?यदि (f(x)=x^2-4x+4) और (g(x)=2x-5) हों, तो ((f+g)(x)) का न्यूनतम मान क्या होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: ( -2 )( -2 )
((f+g)(x)=x^2-2x-1=(x-1)^2-2), so the minimum value is (-2). Completing the square is fast for such questions.((f+g)(x)=x^2-2x-1=(x-1)^2-2), इसलिए न्यूनतम मान (-2) है। पूर्ण वर्ग विधि ऐसे प्रश्नों में तेज होती है।
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