Question

Among the following equations, which are linear
1. `2x+y-z=5`
2. `pix+y-ez=log3`
3. `3^(x)+2y=7`
4. `sinx-y-5z=4`
Select the correct answer using the code given below
A. 1 only
B. 1 and 2 only
C. 3 and 4
D. 1, 2 and 4

Answer 1

Correct Answer - B
An equation of the form ax+by+cz=d, where a, b, c, d are real number, not all zero, is linear.
`implies2x+y-z=5`
and `pix+y-ez` log 3 are linear.