How To Do Square Root On Webwork

How to Enter Answers in WeBWorK

Addition	+	a+b gives �
Subtraction	-	a-b gives �
Multiplication	*	a*b gives �
Multiplication may also be indicated by a space or juxtaposition, such equally 2x , 2 10 , 2*10 , or 2(x+y) .
Sectionalization	/	a/b gives �
Exponents	^ or **	a^b gives � �as does a**b
Parentheses, brackets, etc		(...), [...], {...}

Syntax for inbound expressions

� Exist careful entering expressions merely as you would be conscientious entering expressions in a calculator.

� Sometimes using the * symbol to indicate multiplication makes things easier to read. For example (1+2)*(3+four) and (1+2)(three+four) are both valid. So are iii*4 and 3 4 (3 space 4, not 34) just using an explicit multiplication symbol makes things clearer.

� Use parentheses () , brackets [] , and curly braces {} to make your meaning clear.

� Do not enter 2/4+5 (which is v � ) when you really desire two/(4+5) (which is ii/9).

� Do not enter ii/3*iv (which is eight/3) when you really want 2/(iii*4) (which is 2/12).

� Entering big quotients with foursquare brackets, e.g. [ane+2+3+4]/[5+6+7+8] , is a good practice.

� Be careful when entering functions. It is always good practice to utilize parentheses when entering functions. Write sin( t) instead of sint or sin t . WeBWorK has been programmed to accept sin t or even sint to hateful sin(t). But sin 2t is really sin(2)t, i.east. (sin(2))*t . Be careful.

� Exist careful entering powers of trigonometric, and other, functions. You write (sin(t))^ii for the foursquare of sin(t), and never sin^2t .

� For example for the expression , 2+3sin^two(4x) is wrong. You lot should enter: 2+3*(sin(iv*10))^2 . Why does the terminal expression work?

Please Excuse My Dear Aunt Sally

Operations in parentheses are always washed first (4*x) and then (sin(iv*x)) ], adjacent all exponents are taken, giving (sin(iv*x))^2 , next all multiplications and divisions are performed, giving 3*(sin(iv*ten))^ii . Finally, all additions and subtractions are performed, giving 2+iii*(sin(four*x))^2 .

� Think that multiplication and partition have the same precedence and in that location are no universal rules as to which should be washed first in the absence of parentheses. � WeBWorK and many computers read things from left to correct, so two/3*4 means (ii/3)*4=8/3. But some other computers will read 2/iii*4 as 2/(3*four)=1/vi. �The aforementioned lack of consequent rules concerns powers, expressions like ii^3^four .

The only manner to insure that you are inbound what you want to enter is the use of parentheses!!!

� Use the Preview Button to meet exactly how your entry appears to the system. For example, to tell the divergence between one+two/3+4 and [1+ii]/[three+iv] click the Preview Push .

� If a trouble calls for a decimal answer, give at to the lowest degree four decimal digits, or as many as the trouble specifies. For example, write 2.3453 instead of two.34.

Intervals in WeBWorK

What is the domain of ? I answer is x>=0 (x is greater than or equal to 0). The best way to enter this in WeBWorK is by using interval notation: [0,infinity) .

Other intervals:

(two,3] is the set .

(-infinity,v) is the fix .

(-infinity, infinity) is the fix of all real numbers.

(2,3]U[4,v) is the set . (This is a wedlock of two intervals and can exist very important.)

Mathematical Constants Available In WeBWorK

pi �� This gives π ≈ 3.14159265358979. And then cos( pi) is �one.

due east ��� This gives east ≈ 2.718281828459045. So, ln ( e*2) is i + ln(two)

Scientific Note Bachelor In WeBWorK

two.1E2 gives 210

two.1E-2 gives 0.021

aEb gives �

Cube roots and nth Roots

x ^(i/3) gives , the cube root of x

x ^(1/n) gives , the nthursday root of 10

ten ^(p/q) gives

Mathematical Functions Available In WeBWorK

abs( ) ������� , the accented value

cos( ) ������� the cosine function.� Note: the cosine part uses radian measure

sin( ) ������� the sine office.� Notation: the sine function uses radian mensurate

tan( ) ������ the tangent function.� Note: the tangent office uses radian measure

sec( ) ������� the secant office.� Note: the secant function uses radian measure and �

exp ( ) ������� the exponential function, east^x

log( ) ������� The natural logarithm function.� Note that this is NOT the common log function from pre- �calculus.

ln ( ) ��������� Another, more common proper noun for the natural logarithm, �

logten ( ) �� The common logarithm or log base 10,

arcsin ( ) ��� The changed sine role.� asin ( ) is another name for arcsine.

arccos ( )� The inverse cosine function.� acos ( ) is some other name for arccosine.

arctan ( )� The changed tangent role.� atan ( ) is another name for arctangent.

sqrt( )���� The square root function

sgn ( ) ������ The sign office � �

step( )���� The step role � �(0 if x < 0, 1 if x >= 0)

fact( ) ����� The factorial function (divers simply for not-negative integers), �

Source: https://www.ms.uky.edu/~droyster/courses/fall12/ma114/How%20to%20Enter%20Answers%20in%20WeBWorK.htm

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