यदि (f(x)=x-2+1) और (g(x)=2x) हैं, तो किस स्थिति में (f-g) शून्य होगा?
If (f(x)=x-2+1) and (g(x)=2x), under what condition is (f-g) zero?
Explanation opens after your attempt
A. केवल (x=1) परonly at (x=1)
Concept
(f-g=x-2-2x+1=(x-1)2), which is (0) only at (x=1). A perfect square helps identify the zero quickly.
Why this answer is correct
The correct answer is A. केवल (x=1) पर / only at (x=1). (f-g=x-2-2x+1=(x-1)2), which is (0) only at (x=1). A perfect square helps identify the zero quickly.
Exam Tip
(f-g=x-2-2x+1=(x-1)2), जो (0) केवल (x=1) पर होता है। पूर्ण वर्ग देखकर शून्य जल्दी मिल जाता है।
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