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Question Number 196728 by Amidip last updated on 30/Aug/23

Commented by mr W last updated on 30/Aug/23

$$\text{You can't use 'macro parameter character \#' in math mode}$$

Answered by Frix last updated on 30/Aug/23

$$f\left(4\right)=f(2+2)=2f\left(2\right)+4=10\Rightarrow f\left(2\right)=3$$$$f\left(2\right)=f(1+1)=2f\left(1\right)+1=3\Rightarrow f\left(1\right)=1$$$$f\left(3\right)=f(1+2)=1+3+2=6$$$$13610$$$$234$$$$f\left(x\right)=\frac{x(x+1)}{2}$$$$f\left(2023\right)=2047276$$

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