home *** CD-ROM | disk | FTP | other *** search
- >14.Equation involving roots. (Extra roots)
- P∞^≤±a-b±=b
- MYSZEK 2xy
- EXAMPLE
- e
- t101
- p10
- t0
- zr
- t1
- p6
- t0
- v500
- zrm
- k@m
- cam
- k-m
- cbm
- spm
- k=m
- cbm
- ke
- t3
- p4
- t0
- kem
- p10
- oxm
-
- kd
- t4
- p3
- t0
- kdm
- cam
- k-m
- cbm
- k.m
- c0m
- sdm
- ki
- t5
- p10
- t0
- kim
- cbm
- k.m
- c0m
- sgm
- k^
- t6
- p4
- t0
- k^m
- c2m
- sdm
- shm
- spm
- kb
- t15
- p4
- t0
- kbm
- kbm
- ke
- t7
- p4
- t0
- kem
- p10
- oxm
-
- sp
- t8
- p3
- t0
- spm
- k=m
- kxm
- spm
- kxm
- k+m
- sg
- t9
- p5
- t0
- sgm2
- shm
- kxm2
- spm
- k^m
- c2m
- sdm
- sh
- t10
- p4
- t0
- shm
- ssm
- sem
- ssm
- kxm
- sdm
- ;ke
- ;t18
- ;p3
- ;t0
- ;kem
- ;p10
- ;oxm
-
- kV
- t11
- p3
- t0
- kVm
- p10
- oxm
-
- t12
- p3
- t0
-
- ze
- t102
- p10
- t0
- zxm
- zem
-
- e
- q
-
- BLURB
- 1`We are going to solve the equation:
- 1`#@P∞^≤±a-b±=b@.
- 2`We open the &Equation& window and write the problem.
- 3`As usual after formulating the problem we press &ENTER&.
- 4`We write the domain condition:
- 4`#"$a-b≥0"$.
- 5`#We are going to square both sides of the equation.
- 5`#We add the next condition:
- 5`#"$b≥0"$
- 5`#since roots of even degree can never be negative.
- 5`#It is not a domain condition.
- 6`Now we square both sides of the equation.
- 15`To remove the root sign we use &Backspace&.
- 7`We press &ENTER& to check our solution.
- 8`We evaluate the variable "$a"$.
- 9`We substitute the value for "$a"$ into the domain condition.
- 10`#The domain condition is an identity
- 10`#and we can remove it.
- 11`#This is the final result.
- 11`#We press the &Answer& button.
- ;11`#We press "&ENTER&"
- ;11`#&without making any changes& in the expression.
- 12`Now the problem is solved.
- 18`We press &ENTER& again.
-
-
- 101`#We show how to use 2xy.
- 101``#"The presentation proceeds automatically."
- 101``#To move yellow panels use the mouse.
- 101`#Press ENTER on the KEYBOARD to continue.
-
- 102`#In a moment the &Examples& window will appear.
- 102`You can watch the same presentation again, or
- 102`#load the next example, or
- 102`#close the window and solve your own problem.
-
-