Insert 3

Insert five arithmetic progression members between -7 and 3/2.

Correct result:

a2 =  -5.5833
a3 =  -4.1667
a4 =  -2.75
a5 =  -1.3333
a6 =  0.0833

Solution:

a1=7 a7=3/2=32=1.5  a7=a1+6d  d=(a7a1)/6=(1.5(7))/6=17121.4167  a2=a1+d=(7)+1.4167=6712=5.5833
a3=a2+d=(5.5833)+1.4167=256=4.1667
a4=a3+d=(4.1667)+1.4167=114=2.75
a5=a4+d=(2.75)+1.4167=43=1.3333
a6=a5+d=(1.3333)+1.4167=0.0833



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