Discussion
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- Question
When [x + (1/x)] = 5, then what is the value of [x ? (1/x)]?
Options- A. 11
- B. ± ?22
- C. 21
- D. ± ?21
- Correct Answer
- ± ?21
- 1. Find x, if 5x-6+5x+6 = 6
Options- A. -4
- B. 0
- C. 2
- D. 4 Discuss
- 2. If x + (1/x) = 2, then what is the value of x21 + (1/x1331) ?
Options- A. 0
- B. 1
- C. 2
- D. 3 Discuss
- 3. What is the simplified value of (sec4 A ? tan2 A) ? (tan4 A + sec2 A) ?
Options- A. -1
- B. 1/2
- C. 1
- D. 0 Discuss
- 4. What is the simplified value of [2/(cot A ? tan A)]?
Options- A. sin A cos A
- B. tan 2A
- C. sin2 A
- D. cos2 A Discuss
- 5. If (x/5) + (5/x) = ? 2, then what is the value of x3 ?
Options- A. ?125
- B. 5
- C. 1/125
- D. 625 Discuss
- 6. If x = (?2 + 1)/(?2 ? 1), then what is the value of (x5 + x4 + x2 + x)/x3 ?
Options- A. 5
- B. 2
- C. 2?3
- D. 2?2 Discuss
- 7. If 27x + 27[x?(1/3)] = 972, then what is the value of x?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 8. The inradius of a equilateral triangle is 10 cm. What is the circum-radius (in cm) of the same triangle?
Options- A. 5
- B. 10?3
- C. 20
- D. 20?3 Discuss
- 9. If a = 73, b = 74 and c = 75, then what is the value of a3 + b3 + c3 ? 3abc ?
Options- A. 365
- B. 444
- C. 666
- D. 999 Discuss
- 10. If x2 + (1/x2) = 31/9 and x > 0, then what is the value of x3 + (1/x3) ?
Options- A. 70/9
- B. 154/27
- C. 349/27
- D. 349/7 Discuss
Simplification problems
Search Results
Correct Answer: 2
Correct Answer: 2
Correct Answer: 0
Correct Answer: tan 2A
Correct Answer: ?125
Correct Answer: 2?3
Correct Answer: 2
Correct Answer: 20
Correct Answer: 666
Correct Answer: 154/27
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