Question
My TI calculator displays 'Invalid Op'. What does this mean and how do I fix it?
Asked by: USER7214
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80 Answers
Answer (80)
'Invalid Op' signifies that the calculator encountered an operation it cannot perform. This can be due to several reasons: attempting an operation on incompatible data types (e.g., taking the square root of a negative number without using imaginary numbers), using an undefined function, or a syntax error in a program. Review your input or program code for errors.