Question

Availability
of
water
and
minerals
in
the soil
for
maximum
absorption
by
roots
is
in


the:



a)
B-horizon
b)
C-horizon
c)
A-horizon
d)
Surface
of
soil​

Answer 1

Answer:

Availability of water and minerals in the soil for maximum absorption by roots is in The A horizon. A horizon is the layer called topsoil;This layer generally contains enough partially decomposed (humified) organic matter to give the soil a color darker than the lower horizons.

Answer 2

Answer:

Solution:-

f:N→Y

f(x)=4x2+12x+15

A function is invertible if the function is one-one and onto.

Let x1,x2∈N, such that

f(x1)=f(x2)

4x12+12x1+15=4x22+12x2+15

⇒(x12−x22)+3(x1−x2)=0

⇒(x1−x2)(x1+x2+3)=0

∵x1,x2∈N

⇒x1+x2+3