Sight Enhancement Systems SciPlus-2300, User Manual

Page: 28 / 33

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Page!24!of!28! ! version!1.0!
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Calculating&values&of&f(x):&
Let’s!investigate!how!to!use!the!SciPlusA2300!in!functions!mode!by!evaluating!the!expression:!
y=ax
2
+2bcx-c
!
1. Enter&functions&mode: !!First,!use!the!f(x)!key!to!enter!functions!mode.!!
2. Enter& the& equation: ! Push! f(x)! two! more! times! to! access! the! “y=”! soft! key! (C),! and! push! it.! ! The!
bottom!line!of!the!display!will!now!show!“y=”.!!Now!push!f(x)!again!to!get!back!to!the!variables!list!
a,!b,!c,!x.!!Enter!the!expression!as!follows,!using!the!soft!keys!AAD!!(note!that!‘D’!is!‘x’!in!this!case),!
as!follows:!
a × x 2 + 2 × b × c × x - c
!
Once! you! press! the! !
↵
! ! key,! the! equation! will! be! displayed! in! the! top! line.! ! Of! course,! if! the!
equation!contains!a!syntax!error,!you!will!see!an!error!message.!
For!now,!the!middle!line!will!remain!blank.!
3. Entering&values&for&the&variables: !Push!f(x)!again!so!that!the!soft!keys!show!“a=”,!“b=”,!etc.!!Now!
let’s!enter!specific!values!for!a,!b,!c!and!x!as!follows:!
a= 3
!
↵
b= 2
↵
c= TAN(45)
↵
x= 3
↵
Note! from! the! above! example! that! it’s! perfectly! acceptable! to! enter! a! variable! as! an! expression!
(e.g.!TAN(45)).!!Provided!the!expression!can!be!resolved,!it’ll!just!enter!the!result!as!that!variable.!
You!will!notice!that,!as!these!values!are!entered!they!appear!in!the!middle!“results”!line.!!