Question
If x4 + x - 4 = 47 then find the
value of (x + x-1).Solution
x4 + x - 4 = 47 x4 + 1/x 4 = 47 Add 2 both sides x4 + 1/x 4 + 2 = 49 The above expression is of the form a2 + b2 + 2ab = (a + b)2 where a = x and b = 1/x Then the above expression becomes (x2 + 1/x2)2 =72 Taking square root on both sides (x2 + 1/x2) = 7 Again adding 2 both sides (x2 + 1/x2 + 2) = 9 (x + 1/x)2 = 32 Taking square root on both sides (x + 1/x) = 3
Which of the following words is not a jumbled word of a river in the world?Â
ILNE
HAESMT
EXMICO
ANGGA
Five people, P, Q, R, S, and T, are sitting in a straight row, facing north. Q sits to the immediate left of S. Only three people sit between R and T. P...
Varun, Anwar, Prachi, Fatima and Disha are sitting on a bench. Varun who is not sitting at extreme corners is sitting to the left of Anwar. Fatima is si...
Statement:Â
A. Some fish are birds.
B. No cat is bird.
Conclusion:
I. No bird is cat.
II. Some birds are fish.
Statements: Some leaves are old. All old are clothes. Some clothes are papers.
Conclusion I: All leaves are old.
Conclusion II: Some old are clothes.
Select the figure that will replace the question mark (?) in the following figure series.
In a line, Jaya ranks 84 from the bottom while there are 85 girls in the class. What is Jaya's rank from the top?
In a certain code language, if ANNOY is written as ZMMLB, then how will the SOUND be written in the same code language?
Which of the following letter-clusters will replace the question mark (?) in the given series?
YTM, AQQ, CNU, ?, GHC
Each of the letters in the word ‘ADMIT’ is arranged in alphabetical order. How many letters are these in the English alphabetical series between the...
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