Aptitude - Surds and Indices - Discussion
Discussion Forum : Surds and Indices - General Questions (Q.No. 15)
15.
| If x = 3 + 22, then the value of |  |
x | - | 1 |  |
is: |
| x |
Answer: Option
Explanation:
|
x | - | 1 | |
2 | = x + | 1 | - 2 |
| x | x |
| = (3 + 22) + | 1 | - 2 |
| (3 + 22) |
| = (3 + 22) + | 1 | x | (3 - 22) | - 2 |
| (3 + 22) | (3 - 22) |
= (3 + 22) + (3 - 22) - 2
= 4.
 |
|
x | - | 1 | |
= 2. |
| x |
Discussion:
48 comments Page 4 of 5.
Hari said:
1 decade ago
There is no power of 2 at all. How would you get the answer ?
(1)
Saurav Kumar said:
9 years ago
If x+1/x =1 then (x+1)^3 + 1/(x+1)^3 = ?
Please solve it.
Please solve it.
(1)
Priyanka said:
9 years ago
Why -2 is wriiten at the end ? From where it came ?
Priyanka said:
9 years ago
Not getting this, can anyone explain clearly?
Preethi said:
1 decade ago
Can anyone explain this sum clearly? please.
Joe said:
1 decade ago
In first step, where did minus 2 come from ?
Sagar jain said:
1 decade ago
What if we have to find out x^4 +x^ (-4).
Ahmed said:
9 years ago
Actual answer is 4, but why should be 2.
Saroj said:
1 decade ago
Please explain the logic behind step-3.
Vijay said:
9 years ago
Please explain how they take ^2over it?
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