Which of the following is a linear equation/are linear equations in x1, x2 and x3?
A. x1 + 3√x2 + 5x3 = 5
B. √7x1 − 2x2 + √6x3 = √11
1. Only A 2. Only B 3. Both A and B 4. Neither A nor B.

Question

Which of the following is a linear equation/are linear equations in x1, x2 and x3?
A. x1 + 3√x2 + 5x3 = 5
B. √7x1 − 2x2 + √6x3 = √11
1. Only A    2. Only B    3. Both A and B    4. Neither A nor B.

theviper · Answer

@mukushla plz help ;)

anonymous · Answer

both of them are linear

anonymous · Answer

because exponents of  $x_1$ , $x_2$  and  $x_3$  are 1

anonymous · Answer

Okay,but the variables in linear equations allowed to have roots and exponents?

anonymous · Answer

only B.

anonymous · Answer

you are right, roots are not linear

anonymous · Answer

@Kudos

anonymous · Answer

Thanx

anonymous · Answer

oh sorry that  $\sqrt{x_2}$ 

so @myko  is right

anonymous · Answer

Agreed only B as linear only has x to power of 1.

Taking the second equation B as:
sqrt(7) x1 - 2x2 + sqrt(6) x3 = sqrt(11)

thus no x variable is contained under any of the sqrt roots!