Sequence

Write the first 7 members of this sequence:

a1 = 8
a2 = -9
an+2 = an+1 +4 an

Correct answer:

a1 =  8
a2 =  -9
a3 =  23
a4 =  -13
a5 =  79
a6 =  27
a7 =  343

Step-by-step explanation:

a1=8
a2=9
a3=9+48=23
a4=23+4(9)=13
a5=13+423=79
a6=79+4(13)=27
a7=27+479=343



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