I'm stuck with this equation, please do help

MethMath11

Junior Member
Joined
Mar 29, 2019
Messages
73
i tried the
residual theorem (not sure bout the name, but we call it teorima sisa)
 

Attachments

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
19,094
i tried the residual theorem (not sure bout the name, but we call it teorima sisa)
Please show us your work with residual theorem - and show us the result (even if it is wrong/incomplete).
 

HallsofIvy

Elite Member
Joined
Jan 27, 2012
Messages
5,299
Are you sure it wasn't "f(1)- f(-3)"?
 

MethMath11

Junior Member
Joined
Mar 29, 2019
Messages
73
Please show us your work with residual theorem - and show us the result (even if it is wrong/incomplete).
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?
 

Subhotosh Khan

Super Moderator
Staff member
Joined
Jun 18, 2007
Messages
19,094
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?
You need to be more careful! How did h(x) turn out to H(x)?
 

Dr.Peterson

Elite Member
Joined
Nov 12, 2017
Messages
5,067
f(x) = ((x^2) + 2x - 3).h(x) +(Ax + B)

f(1) = (1 + 2 -3)H(x)+ A +B
f(3) =(9 + 6 -3) h(x) + 3A + B

A + B - (12(h(x) + 3A + B) = 4

How to eliminate H(x)?
I think this is HallsofIvy's point: the question can't be answered as it stands, but if 3 had been -3, it could. Give that a try.

It looks like an error in the problem.
 
Top