यदि (f(x)=2x-1) और (g(x)=3-x) हैं, तो ((2f-3g)(4)) का मान क्या होगा?
If (f(x)=2x-1) and (g(x)=3-x), what is the value of ((2f-3g)(4))?
Explanation opens after your attempt
A. (23)
Concept
((2f-3g)(x)=2(2x-1)-3(3-x)=7x-11), so at (x=4) the value is (17). Always simplify before substituting.
Why this answer is correct
The correct answer is A. (23). ((2f-3g)(x)=2(2x-1)-3(3-x)=7x-11), so at (x=4) the value is (17). Always simplify before substituting.
Exam Tip
((2f-3g)(x)=2(2x-1)-3(3-x)=7x-11), इसलिए (x=4) पर मान (17) नहीं बल्कि (17)? जाँचें: (28-11=17)।
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