Question
If {x + (1/x)} = 8, then find the value of {x 4
+ (1/x 4 )}.Solution
{x + (1/x)} = 8
Squaring both sides,
Using (a + b) 2 = a 2 + 2ab + b 2
{x + (1/x)} 2 = 8 2
So, x 2 + (1/x 2 ) + 2 × (x) × (1/x) = 64
Or, x 2 + (1/x 2 ) + 2 = 64
Or, x 2 + (1/x 2 ) = 64 – 2 = 62
Again squaring both sides,
{x 2 + (1/x 2 )} 2 = 62 2
So, x 4 + (1/x 4 ) + 2 × (x 2 ) × (1/x 2 ) = 3844
Or, x 4 + (1/x 4 ) + 2 = 3844
Or, x 4 + (1/x 4 ) = 3844 – 2 = 3842
Which type of water absorption relies on the osmotic gradient, with root cells actively participating in the process by spending metabolic energy?
Which scheme is providing guaranteed 100 Days employment unskilled and manual?
Amount of water transpired by the crop to produce unit amount of dry matter is called _____
The full form of MRA is:
Moist soils warms up slowly because
The dissolution of old cuticle and formation of new one is known as:
Butter and animal fat are
What is the spacing between row to row in wheat crop under irrigated condition?
Primitive and least controlled surface irrigation method is
A photosynthetic unit consists: