MHT CET202015 Oct 2020Evening ShiftMathematicsDifferentiationActual
If 2 f ( x )= f ^ (x) and f (0)=3 , then the value of f (2) is
Options
- A3 e²
- B2 e³
- C4 e³
- D3 e⁴
Correct answer
D. 3 e⁴
Step-by-step solution
We have f^ (x)=2 f(x) array l f ^ ( x ) f ( x ) d x = 2 ~d x | f ( x )|=2 x + c array Now f(0)=3 array l | 3|=0+c c= 3 |f(x)|=2 x+ 3 array When x=2 , aligned & | f (2)|=2(2)+ 3=4+ 3 & f (2)= e ^ 4+ 3 = e ⁴ e ^ 3 =3 e ⁴ aligned