Write the coefficients of `x^2`in each of the following:(i) `2+x^2+x` (ii) `2-x^2+x^3` (iii) `pi/2x^2+x` (iv) `sqrt(2)x-1`

Explanation

To find the coefficients of \( x^2 \) in the given polynomials, we will analyze each polynomial individually and identify the number that is multiplied by \( x^2 \).

### Step-by-Step Solution:

**(i)** For the polynomial \( 2 + x^2 + x \):
- The term containing \( x^2 \) is \( x^2 \).
- It can be rewritten as \( 1 \cdot x^2 \).
- Therefore, the coefficient of \( x^2 \) is **1**.
...