Negative difference

Find four arithmetic progression members between 7 and -6.

Correct answer:

a2 =  4.4
a3 =  1.8
a4 =  -0.8
a5 =  -3.4

Step-by-step explanation:

a1=7 a6=6  an=a1+d (n1) a6=a1+5d d=a6a15=(6)75=135=235=2.6  a2=a1+d=7+(2.6)=225=425=4.4

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