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1 . x+1x=-5

A. $\frac{1}{4}$
B. $4$
C. $- 4$
D. $- \frac{1}{4}$

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Answer: Option D

Explanation:

১৬ তম শিক্ষক নিবন্ধন পরীক্ষা (স্কুল পর্যায়) (30-08-2019)

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2 . x+1x=-5

A. $\frac{1}{4}$
B. $4$
C. $- 4$
D. $- \frac{1}{4}$

View Answer

Discuss in Forum

Workspace

Report

Answer: Option D

Explanation:

দেওয়া আছে, x+ \frac{1}{x} =-5 \Rightarrow \frac{x^{2} + 1}{x} = - 5 \Rightarrow x^{2} + 1 = - 5 x এখন, \frac{x}{x^{2} + x + 1} = \frac{x}{x^{2} + 1 + x} = \frac{x}{- 5 x + x} = \frac{x}{- 4 x} = - \frac{1}{4}