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Differential Equations question

2016 · Shift 1 · Q32
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  5. /2016 · Shift 1 · Q32

Differential Equations question

2016 · Shift 1 · Q32

JEE AdvancedMathematicsDifferential EquationsMultiple correct+4 / −2
Let f:(0,∞)→Rf:(0,\infty ) \to Rf:(0,∞)→R be a differentiable function such that f′(x)=2−f(x)xf'(x) = 2 - {{f(x)} \over x}f′(x)=2−xf(x)​ for all x∈(0,∞)x \in (0,\infty )x∈(0,∞) and f(1)e1f(1) e 1f(1)e1. Then
  1. A
    lim⁡x→0+f′(1x)=1\mathop {\lim }\limits_{x \to {0^ + }} f'\left( {{1 \over x}} \right) = 1x→0+lim​f′(x1​)=1
  2. B
    lim⁡x→0+xf(1x)=2\mathop {\lim }\limits_{x \to {0^ + }} xf\left( {{1 \over x}} \right) = 2x→0+lim​xf(x1​)=2
  3. C
    lim⁡x→0+x2f′(x)=0\mathop {\lim }\limits_{x \to {0^ + }} {x^2}f'(x) = 0x→0+lim​x2f′(x)=0
  4. D
    ∣f(x)∣≤2\left| {f(x)} \right| \le 2∣f(x)∣≤2 for all x∈(0,2)x \in (0,2)x∈(0,2)
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