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- Question
The Value of logtan10+logtan20+??+logtan890 is
Options- A. -1
- B. 0
- C. 1/2
- D. 1
- Correct Answer
- 0
Explanation= log 1 + log 1 +.....+log 1
= 0.
- 1. Find value of log27 +log 8 +log1000log 120
Options- A. 1/2
- B. 3/2
- C. 2
- D. 2/3 Discuss
- 2. What is the characteristic of the logarithm of 0.0000134?
Options- A. 5
- B. -5
- C. 6
- D. -6 Discuss
- 3. if log105+log5x+1=log10(x+5)+1,then x is equal to
Options- A. 1
- B. 3
- C. 5
- D. 10 Discuss
- 4. For x?N, x>1 , and p=logxx+1 , q=logx+1x+2 then which one of the following is correct?
Options- A. p < q
- B. p = q
- C. p > q
- D. can't be determined Discuss
- 5. Solve the equation 122x+1 = 1 ?
Options- A. -1/2
- B. 1/2
- C. 1
- D. -1 Discuss
- 6. The value of 13log10125 - 2log104 + log1032 :
Options- A. 0
- B. 1
- C. 2
- D. 4/5 Discuss
- 7. If a2+b2 = c2 , then 1logc+ab + 1logc-ab = ?
Options- A. 1
- B. 2
- C. 4
- D. 8 Discuss
- 8. If log330 = 1a and log530=1b then the value of 3log302 is:
Options- A. 3(1+a+b)
- B. 2(1-a-b)
- C. 3(1-a-b)
- D. 3(1+a-b) Discuss
- 9. Which of the following statements is not correct?
Options- A. log10 = 1
- B. log (2 + 3) = log (2 x 3)
- C. log1 = 0
- D. log (1 + 2 + 3) = log 1 + log 2 + log 3 Discuss
- 10. Find x if log1218 = log24x + 1. log24x+1 + 4
Options- A. 0
- B. 1
- C. 2
- D. None of these Discuss
Logarithm problems
Search Results
Correct Answer: 3/2
Explanation:
=
Correct Answer: -5
Explanation:
log (0.0000134). Since there are four zeros between the decimal point and
the first significant digit, the characteristic is ?5.
Correct Answer: 3
Explanation:
5x+1=2x+10
3x=9
x=3
Correct Answer: p > q
Explanation:
for (k,l) > 0 and k > l
Let k = x+1 and l = x
Therefore,
(x + 1) > x
Therefore,
Correct Answer: -1/2
Explanation:
Rewrite equation as
Leads to 2x + 1 = 0
Solve for x : x = -1/2
Correct Answer: 1
Correct Answer: 2
Explanation:
Given
Now
=
=
=
Correct Answer: 3(1-a-b)
Correct Answer: log (2 + 3) = log (2 x 3)
Explanation:
log (2 + 3) = log 5
log (2 x 3) = log 2 + log 3
log (2 + 3)
log (2 x 3)
Correct Answer: 0
Explanation:
By trial and error method, when we substitute
x = 0
Both LHS and RHS are equal.
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