AP - simple

Determine the first nine elements of sequence if a10 = -1 and d = 4

Result

a9 =  -5
a8 =  -9
a7 =  -13
a6 =  -17
a5 =  -21
a4 =  -25
a3 =  -29
a2 =  -33
a1 =  -37

Solution:

a9=14=5a_9=-1-4 = -5
a8=54=9a_8=-5-4 = -9
a7=94=13a_7=-9-4 = -13
a6=134=17a_6=-13-4 = -17
a5=174=21a_5=-17-4 = -21
a4=214=25a_4=-21-4 = -25
a3=254=29a_3=-25-4 = -29
a2=294=33a_2=-29-4 = -33
a1=334=37a_1=-33-4 = -37



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