Question
If (x
–4)3+(x–5)3+(x–6)3 = 3(x–4)(x–5)(x–6), Then x = ?Solution
if a+b+c = 0 then a3+b3+c3 = 3abc and it is also vice versa. So Here (x –4)3+(x–5)3+(x–6)3 =0 so 3x-15 = 0 or x = 5 ` `
- Find the wrong number in the given number series.
12, 20, 31, 45, 62, 84 81, 154, 124, 197, 167, 235
In each of the following giving number series, a wrong number is given. Find out the wrong number?
46 23 23 34.5 70 172.5
...- Find the wrong number in the given number series.
10, 19, 3, 28, 5, 54 14Â Â Â Â 15Â Â Â Â Â 24Â Â Â Â Â Â 50Â Â Â Â Â Â 98Â Â Â Â Â 179
...Find the wrong number in the given number series.
2, 3, 5, 8, 13, 22, 34Find the wrong number in the given number series.
- 71, - 7, 43, 78, 103, 119
66, 115, 34, 155, 14, 211
11, 12, 20, 58, 234, 1168
Find the wrong number in the given number series.
21, 42, 84, 116, 132, 264