medium · GMAT Quant
A continuous signal function f(x) satisfies f(x) = begincases 7x + k, & x ≥ 0 -3x + 12, & x < 0 endcases. If f(x) is continuous at x = 0
What is the value of f(4) + f(-4)?
- 64
- 40
- 52
- 24
- 80
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