Main.c: In function 'main':
Main.c:6:11: warning: implicit declaration of function 'fab'; did you mean 'fabs'? [-Wimplicit-function-declaration]
    6 |     while(fab(term)>=1e-4){
      |           ^~~
      |           fabs
/usr/lib/gcc/x86_64-alpine-linux-musl/12.2.1/../../../../x86_64-alpine-linux-musl/bin/ld: /tmp/cckDDFLb.o: in function `main':
Main.c:(.text.startup+0x4b): undefined reference to `fab'
collect2: error: ld returned 1 exit status