If xy+yx=7\frac{x}{y}+\frac{y}{x}=\sqrt{7}yx +xy =7 , What is the value of x4y4+y4x4\frac{x^4}{y^4}+\frac{y^4}{x^4}y4x4 +x4y4 =?

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If $\frac{x}{y}+\frac{y}{x}=\sqrt{7}$ , What is the value of $\frac{x^4}{y^4}+\frac{y^4}{x^4}$ =?

A22

B25

C27

D23

উত্তর : D.

ভেরিফাইড

শেয়ার :

সম্পর্কিত প্রশ্ন সমূহ

১.

In a zoo, each pigeon has 2 legs, and each rabbit has 4 legs. The head count of the two species together is 12, and the leg count is 32. How many pigeons and how many rabbits are there in the zoo?

A4,8

B6,6

C6,8

D8,4

২.

A train takes 8 seconds to cross a pole and 18 seconds to cross a platform of length 120m. What is the length of the train?

A80 m

B150 m

C200 m

D96 m

৩.

The average of 8 numbers is 8. If 4 is subtracted from each of 6 of the numbers, what is the new average?

A3.5

D6.5

৪.

If the side of a square is increased by 10%, by what percent will the area be increased?

16%

21%

32%

100%

৫.

If the radius of a right cylinder is tripled and the height is reduced by 40%, then what would the percentage change in volume?

320%

440%

460%

540%

৬.

What is the angle between the hour and minute hands of a clock at 14:50?

A135°

B140°

C145°

D150°

৭.

The average of a non-zero number and its square is 5 times the number. The number is-

B17

C29

Dnone of these

৮.

How many terms of the arithmetic progression 2,7,12,... should be taken so that their sum equals 354?

A10

B11

C12

D13

৯.

If $2^x=3^y=6^{-z}$ , find the value of $\frac{1}{x}+\frac{1}{y}+\frac{1}{z}$

A-1

১০.

In a simultaneous throw of a pair of dice, what is the probability of getting a total more than 8?

$\frac{5}{18}$

$\frac{13}{18}$

$\frac{1}{4}$

$\frac{7}{18}$