Question

4. Balance of oxygen and carbon dioxide in air is maintained by.....................
(a) plants only (b) animals only
(c) both plants and animals
(d) moving vehicles ​

Answer 1

Answer:

what would be the reading of ammeter and voltmeter in the given circuit?

Step-by-step explanation:

f(x) = kx³ – 8x² + 5

Roots are α – β , α & α +β

Sum of roots = – (-8)/k

Sum of roots = α – β + α + α +β = 3α

= 3α = 8/k

= k = 8/3α

or we can solve as below

f(x) = (x – (α – β)(x – α)(x – (α +β))

= (x – α)(x² – x(α+β + α – β) + (α² – β²))

= (x – α)(x² – 2xα + (α² – β²))

= x³ – 2x²α + x(α² – β²) – αx² +2α²x – α³ + αβ²

= x³ – 3αx² + x(3α² – β²) + αβ² – α³

= kx³ – 3αkx² + xk(3α² – β²) + k(αβ² – α³)

comparing with

kx³ – 8x² + 5

k(3α² – β²) = 0 => 3α² = β²

k(αβ² – α³) = 5

=k(3α³ – α³) = 5

= k2α³ = 5

3αk = 8 => k = 8/3α

(8/3α)2α³ = 5

=> α² = 15/16

=> α = √15 / 4

Answer 2

Answer:

option (c) both plants and animals

Explanation:

Plants and animal dependent on each other for maintaining the balance of carbon dioxide and oxygen in the air, as we know plants take in carbon dioxide and give out oxygen during the process of photosynthesis where as animal take in oxygen and gives out carbon dioxide during the process of respiration. Ãnd if there is no one of these, then the balance of the atmosphere can deteriorate.