Ap , if the common difference (d)=4 and the seven therm (a7)is 4 then find the first them ?

Ap , if the common difference (d)=4 and the seven therm (a7)is 4 then

1.	Ap , if the common difference (d)=4 and the seven therm (a7)is 4 then find the first them ?
Answer» Ohh sorry? 4=a+6×4. 4=a+24. a=20 Really sorry for a silly mistake? a=-20 a7=a+6d =a +6×4=a+24=0 a=-24 then first term is -24 a=-20. Hope it helps you......