Question
If x4 + x - 4 = 47 then find the
value of (x + x-1).Solution
x4 + x - 4 = 47 x4 + 1/x 4 = 47 Add 2 both sides x4 + 1/x 4 + 2 = 49 The above expression is of the form a2 + b2 + 2ab = (a + b)2 where a = x and b = 1/x Then the above expression becomes (x2 + 1/x2)2 =72 Taking square root on both sides (x2 + 1/x2) = 7 Again adding 2 both sides (x2 + 1/x2 + 2) = 9 (x + 1/x)2 = 32 Taking square root on both sides (x + 1/x) = 3
. …………………………….is the prominent member of 1:1 type group in which one tetrahedral and one octahedral layer is present.
...Which clay mineral group is known for its ability to swell and expand when wetted?
Soil is a natural body composed of mineral and organic costituents, having definite genesis and a distinct nature of its own. Who amongst the following ...
What is the color of the tag used for certified seed?
When the contact of soil moisture still decreased below the wilting point in way that the water is held very tightly & may be state of vapour around soi...
Which soil property is least affected by the size and arrangement of soil particles?
The absolute density of soil is also referred to as ……………….which is generally 2.60-2.75 gm/cm3
In terms of the order from youngest to the oldest soil, which one of the following is the correct chronological sequence?
Which mineral is considered highly resistant to weathering due to its densely packed structure and lack of substitutions?
Which property of soil usually reflects the extent of leaching and weathering of soils?
Relevant for Exams:
