Question
If √x + 1/√x = 2 then find the value of
3x2 + 1/3x2.Solution
√x + 1/√x = 2 Squaring on both sides (√x + 1/√x)2 = 4 x + (1/x) + 2 = 4 x + 1/x = 2 By observing the above equation the value of x is 1 = 3x2 + 1/3x2 = 3(1) + 1/3(1) = 3 + 1/3 = 10/3
Find the last digit of (12123 – 1).
- Determine the remainder when
- Find the least perfect square number divisible by 8, 18, 27, and 40. Then, calculate the remainder when it is divided by 121.
If the 4-digit number m52n is exactly divisible by 9, then what is the least value of (m + n)?
A waiter income consist of his salary and tips. During one week his tips were 4/5 of his salary. What portion of his income came from tips?
Out of four numbers the average of the first three is 16 and that of the last three is 15. If the last number is 20 then the first number is
Determine the highest possible value of (x + y) if the number '3x725y4' is divisible by 12.
The difference between two numbers is 6, and their product is 5. What is the sum of the squares of these two numbers?
 Find the remainder when x³ + 2x² − 5x + 7 is divided by (x − 2).
Find the difference between minimum and maximum value of 'b' such that '4b2381' is always divisible by 3.
