20 Most Recent Texas Instruments TI-86 Calculator Questions & Answers

Every time you change batteries this will happen to you. First press 2nd then press and hold the down arrow. Hold until their is no black in the background but you can still see the numbers on the screen.

The simplest way would be to create a table where each x-value has a y-value that is the residual at the corresponding x. With a 2-list data set you can plot you residual plot.

Error 07 is Syntax Error. From the manual: "You entered a value; look for misplaced functions, arguments, parentheses, or commas; check the syntax description in the A to Z reference."

If you can't find and fix the error, could you post the expression producing the error?

There is no solution for old age. Get a newer calculator.

There is a way to do it. I believe you go into "complex" or "math" buttons. These buttons are yellow on the calculator. Therefore, to access them you must hit "2nd" then the button.

Better yet, you can also get around this dilemma another way. You can enter "the cubed root of x" by raising x to 1/3.

For example the cubed root of x = x^(1/3). It is best to place parentheses around 1/3 so the calculator knows exactly what you mean.

Another example, the "cubed root of (x + 1)" can be entered by:
(x+1)^(1/3) Note the parenteses around both (x+1) and (1/3). This applies if the radical cover both "x" and "1".

Hope this helps.

The - key is for subtraction, an operation that needs two numbers. If you press - as the first key on a line, the calculator assumes you want to subtract something from the previous answer, Ans. If you want to enter a negative number, use the (-) key on the bottom row of the keyboard, just to the left of the Enter key.

See images below

Hello,
There is a relation between roots and fractionary powers.

2nd root (square root) of X = X^(1/2) power 1/2
3rd root (cubic root) of X = X^(1/3) power 1/3
4th root of X = X^(1/4)
...
n-th root of X = X^(1/n)

Use the raise to arbitrary power key labeled as a caret [^] or [X to the y] or [Y to the x]
Hope it helps.

See cap image below

83/360 is already reduced to lowest terms since 83 and 360 have no factors in common (other than 1).

Just divide the numerator by the denominator. For example, to convert 1/4 to decimal, press 1 / 4 ENTER and see .25

Read on how to set up calculator for graphing. And check your input.

You can type in an x-variable by pressing the x-var key. For other graph types, the variables r, theta, t, can be enter by pressing the appropriate function key. from the graph equation entry screen.

Error 07 Syntax Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign y= (-) 1.5*x +3 Try entering it as 3 - 1.5*x

Error 07 Syntax Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign y= (-) 1.5*x +3 Try entering it as 3 - 1.5*x

Error 07 Syntax Means you made a typing error while entering the equation. Using the minus sign instead of the negation sign (change sign) (-), can produce a syntax error. Maybe you need to explicitly type the multiplication sign y= (-) 1.5*x +3 Try entering it as 3 - 1.5*x

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