Advertisements
Advertisements
प्रश्न
Show that the value of x is 11, when `("x"^3 + "3x")/(3"x"^2 + 1) = 341/91`
उत्तर
`("x"^3 + "3x")/(3"x"^2 + 1) = 341/91`
⇒ 91(x3 + 3x) = 341(3x2 + 1)
⇒ 91x3 - 1023x2 + 273x - 341 = O
LHS
91x3 - 1023x2 + 273x - 341
= 91( 11 × 11 × 11) - 1023 (11 × 11) + 273 (11) -341
= (91 × 1331) - (1023 × 121) + (273 × 11) - 341
= 121121 - 123783 + 3003 - 341
= 0= RHS
LHS = RHS.
Hence x = 11
APPEARS IN
संबंधित प्रश्न
If `(y- x)/x = 3/8` , find the value of `y /x`
What quantity must be added to each term of the ratio (p + q) : (p - q) to make it equal to (p + q)2 : (p - q)2 ?
Divide 64 cm long string into two parts in the ratio 5 : 3.
The ages of two boys A and B are 6 years 8 months and 7 years 4 months respectively. Divide Rs. 3,150 in the ratio of their ages.
Find the third proportional of 1.8 and 0.6
Find the third proportional to 5.25, 7
In a mixture of 45 litres, the ratio of milk to water is 13 : 2. How much water must be added to this mixture to make the ratio of milk to water as 3 : 1 ?
The number of milk teeth in human beings is 20 and the number of permanent teeth is 32. Find the ratio of the number of milk teeth to the number of permanent teeth.
An office opens at 9 a.m. and closes at 5.30 p.m. with a lunch break of 30 minutes. What is the ratio of lunch break to the total period in the office?
In a college, out of 4320 students, 2300 are girls. Find the ratio of number of boys to the number of girls.
