यदि (f(x)=12x+50), तो (f(5x)-f(2x)) कब (180) होगा?
If (f(x)=12x+50), when will (f(5x)-f(2x)) be (180)?
Explanation opens after your attempt
B. (x=5)
Concept
(f(5x)-f(2x)=(60x+50)-(24x+50)=36x). From (36x=180), (x=5).
Why this answer is correct
The correct answer is B. (x=5). (f(5x)-f(2x)=(60x+50)-(24x+50)=36x). From (36x=180), (x=5).
Exam Tip
(f(5x)-f(2x)=(60x+50)-(24x+50)=36x) है। (36x=180) से (x=5) है।
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