Question

I don't understand how it's wrong??

Answer 1

`a_1=4\\a_n=10-3a_(n-1)\\\\a_2=10-3a_1\to a_2=10-3(4)=10-12=-2\\\\a_3=10-3a_2\to a_3=10-3(-2)=10+6=16\\\\a_4=10-3a_3\to a_4=10-3(16)=10-48=-38\\\\a_5=10-3a_4\to a_5=10-3(-38)=10+114=124\\\\\underline{\text...3...}\\a_n\ \ \text..4..`