x→alim9(k)−f(x)k9(x)−kf(x)=4 (By L'Hospital rule) x→alimk9′(x)−f′(x)9′(x)−f′(x)=4 or k=4
Let f( a)= g( a)= k and their nth derivatives f^ n( a), g^ n( a) exist and are not equal for some n. Further if lim _x → a f(a) g(x)-f(a)-g(a)…
JEE Main 2003 — Mathematics Calculus
Let f(a)=g(a)=k and their nth derivatives fn(a),gn(a) exist and are not equal for some n. Further if x→alimg(x)−f(x)f(a)g(x)−f(a)−g(a)f(x)+f(a)=4 then the value of k is
Held on 30 Apr 2003 · Verified 6 Jul 2026.
Options
- A
0
- B
4
- C
2
- D
1
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