If x – 1/x = 9, then x3 – 1/x3 is:
Since, x – 1/x = 15 Cubing both sides we get; x3 – 1/x3 – 3 × (x) × (1/x) × (x – 1/x) = 729 Or x3 – 1/ x3 = 1331 + 3 × 9 = 729 + 27 = 756 Alternate method: If it is given, x – 1/x = n and we have to find x3 – 1/x3, can directly use n3 + 3n. x – 1/x = 9 By using n3 + 3n, where n = 9 => 93 + 3 × 9 => 729 + 27 = 756
Select the number that can replace the question mark (?) in the given number series.
15, 19, 28, 44, ?, 105
Select the option figure in which the given figure (X) is embedded as its part (rotation is NOT allowed).
In the following number-pairs, the second number is obtained by applying certain mathematical operations to the first number. In three of the four pairs...
Select the letter that can replace the question mark (?) in the following series.
A, C, E, G, I, Κ, ?
Study the given pattern carefully and select the number that can replace the question mark (?) in it.
(6, 4, 6)
(18, 9, 13)
(8, 6, ...
A bank in to the east of a shop. A college is to the north-west of the Bank. A bus stop is to the north of the shop and to the west of the college. In w...
Select the option figure in which the given figure (X) is embedded as its part (rotation is NOT allowed).
In a certain code language, BABE is coded as YZYV then what is the code for ACID?
Select the option that is related to the third letter-cluster in the same way as the second letter- cluster is related to the first letter-cluster.
Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.
