Question
If a + 1/a = -2 then the value of a1000 +
a- 1000 isSolution
a + 1/a = –2    let a = -1 -1 + = 1/-1+-1 = -2 ∴ a = −1 a 1000 + a−1000 = (−1) 1000 + (−1)−1000 = 1 + 1 = 2
A bag contains 700 coins of 25p denomination and 1400 coins of 50p denominations. If 17% of 25p coins and 34% of 50p coins are removed, the percentage o...
A quantity is increased by 15% and then again increased by 10%. What is the net percentage increase?
In the year 2022, an office had a total of 9,000 employees, including both males and females. In the following year, the number of male employees increa...
Mr Rajesh buys a toy for Rs 27.50 and sells it for Rs 28.60 Find the gain percentage
Rohit scored 150 runs in a match which was 75% of the total team score. If the team scored 20 runs as extras, then find the runs scored by the rest of t...
If 97% of students are present in a class and 12 students are absent. Find total numbers of student in class?
A spent 12.5% of his monthly income on study and 32% of the remaining on rent. If amount spent on rent is Rs. 1512, then find the amount spent on study
If the amount on a certain principal in 3 years at 12% rate of interest compounded annually is Rs 12,000, what will be the amount (in Rs) after the 4th ...
Milk becomes 15% costlier. Find the percentage decrease in usage to maintain the same expenditure.Round to the nearest whole number.
In a city, the number of persons travelling by bike is 62.5% the number of persons travelling by metro. The number of persons travelling on foot is 60% ...