Question

in. an. so. if. the. common. difference. is -4. and the seventh term. is. 4. then find the first term

Answer 1

d = (-4)

T7 = 4

=> a + 6d = 4

=> a + 6(-4) = 4

=> a - 24 = 4

=> a = 4 + 24

=> a = 28

First term = 28

Answer 2

given d=-4
t7 =4 let a be the first term :
a+6d = 4
a+6 (-4)=4
a-24=4
a=4+24
therefore a= 28.........then the first term is 28