[jain12345]

hi puys

these are a few questions from the amazing workshop of SPARK.
those who have missed have missed a lot but dont miss this discussion.
questions are awesome.

i have joined the workshop. i will be posting all the questions on this thread..

i hope it will be helpful for all of us.

[jain12345]

hi puys i will post the question in sequence.

so here goes the first question

1. The system of equation:
ax + y = 2 and x + ay = 2a , for a 1 has solutions :
(a) a = 0, y = - 2

(b) x = 2, y = 0

(c) x = 0, y = 2

(d) None of these

[masoom]

Originally Posted by jain12345

hi puys i will post the question in sequence.

so here goes the first question

1. The system of equation:
ax + y = 2 and x + ay = 2a , for a 1 has solutions :
(a) a = 0, y = - 2

(b) x = 2, y = 0

(c) x = 0, y = 2

(d) None of these

for a=1..

equation will become same...

so i guess infinite solutions...

[jain12345]

Originally Posted by masoom

for a=1..

equation will become same...

so i guess infinite solutions...

hi the answer is "c"

[warrior16nov.]

Originally Posted by jain12345

hi the answer is "c"

hi can u explain me that hows the answer is c

[jain12345]

Originally Posted by warrior16nov.

hi can u explain me that hows the answer is c

hi calculate the determinants of the system

so u get x = 0 and y = 2

[jain12345]

hi guys here goes the second question

2. In copying a quadratic equation of the form x^2 + px + q =0, a student wrote the coefficient of x incorrectly and the roots were found to be 3 and 10; another student wrote the same equation but he wrote the constant term incorrectly and thus he found the roots to be 4 and 7. The roots of the correct equation are.
(a) 5,6

(b) 4,6

(c) 4, 5

(d) None of these

[shivam_01]

Originally Posted by jain12345

hi guys here goes the second question

2. In copying a quadratic equation of the form x^2 + px + q =0, a student wrote the coefficient of x incorrectly and the roots were found to be 3 and 10; another student wrote the same equation but he wrote the constant term incorrectly and thus he found the roots to be 4 and 7. The roots of the correct equation are.
(a) 5,6

(b) 4,6

(c) 4, 5

(d) None of these

x^2-11x+30 = 0 henc the roots are 5,6 Option a

[jain12345]

yup u got it correct..

[jain12345]

here goes the third one

3. The number of solutions of the equation 2x^2 + 9lxl-5 = 0 is
(a) 4

(b) 2

(c) 1

(d) 0