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Observe the following statements: $I. f(x) =ax^{41}+bx^{-40}=> \large\frac{f''(x)}{f(x)}$$=1640\;x^{-2} \quad II. \large\frac{d}{dx} $$\tan ^{-1} \bigg(\large\frac{2x}{1-x^2}\bigg)=\frac{1}{1+x^2}$Which of the following is correct ?

(a) I is true, but II is false (b) Both I and II are true (c) Neither I nor II is true (d) I is false, but II is true
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(a) I is true, but II is false
answered Feb 27, 2014 by meena.p

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