I have a question from the book "Calculus" by Gilbert Strang. It's available for download here.
Anyway on p7 is the question:
Find the linear function with f(t+2)=f(t)+6 and f(1)=10. The answer is 3t+7. I cannot even begin to figure out a way to find this out. please help, thanks!

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Thank you that is actually a lot easier!

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