Question

ПОМОГИТЕ ПЖ СРОЧНО НАДО!!
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Answer 1

$\displaystyle\bf\\a_{1} =0,5\\\\a_{2} =5\\\\a_{n+2} =a_{n+1} -4a_{n} \\\\1) \ n=1\\\\a_{1+2} =a_{1+1} -4a_{1} \\\\a_{3} =a_{2} -4a_{1} =5-4\cdot 0,5=5-2=3\\\\\\2) \ n=2\\\\a_{2+2} =a_{2+1} -4a_{2} \\\\a_{4} =a_{3} -4a_{2} =3-4\cdot 5=3-20=-17\\\\\\3) \ n=3\\\\a_{3+2} =a_{3+1} -4a_{3} \\\\a_{5} =a_{4} -4a_{3} =-17-4\cdot 3=-17-12=-29\\\\\\Otvet: \ 0,5 \ \ ; \ \ 5 \ \ ; \ \ 3 \ \ ; \ \ -17 \ \ ; \ \ -29$