Skip to first unread message
Zohair Merchant
Nov 11, 2020, 2:59:27 AM11/11/20
to Discussion forum for Mathematics for Data Science I
Q11)Find the values of r for which the line (r + 5)x – (r – 1)y + r square + 4r − 5 = 0 is parallel to the x-axis
The Solution mentions:
"Using the slope intercept form of the line (r + 5)x − (r − 1)y + r square + 4r − 5 = 0, the slope of the line is
m1 = r + 5/r − 1"
Doubt:
Here I understand m = -A/B
But why is B taken as r-1 when the question has -(r-1).
Why is not B taken as -r-1 ?
The round brackets in -(r-1) is where I think i'm going wrong.
Why is the minus sign not taken?
Debajyoti Biswas
Nov 11, 2020, 4:02:05 AM11/11/20
to Discussion forum for Mathematics for Data Science I, Zohair Merchant
The equation of straight line is y=mx+c, bring y-part to RHS, then solve the problem
San Izaan
Nov 21, 2020, 8:30:16 AM11/21/20
to Discussion forum for Mathematics for Data Science I, deba...@onlinedegree.iitm.ac.in, Zohair Merchant
Hey!
Why is m= -a/b. Did I miss something? Wasn't it always -b/a. I got this write when I did it. Now that am revisiting all the questions I don't see why the formulae has change.
Can you please help me?
Thank you.
Reply all
Reply to author
Forward
Message has been deleted
0 new messages