In an ap if the common different -4,and the seventh term is 4, then find the first term
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Givend=-4 and T7=4a+ 6d=4a+6(-4)=4a=4+24a=28
Given that a7=4a+6d=4 a+6(-4)=4 (d=-4)a-24=4a=24+4a=28
A=12
28
_12
A=28