Your instructor referred to a case 3 for evaluating line integrals in which integration is not needed. Which of the following conditions must be true to use this case? select all that apply.
a. must be a closed path.
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b. F must be constant.
c must be a line or line segment.
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d. IIFIl must be constant on C.
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f. F must be in the direction of C.
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g. F must be tangent to C.
