Question

in an ap , d=-4 and seventeenth term (a7) is 4, find first term

Answer 1

Hello friend your answer is
a=?
d=-4
a7=4
a7=a+6d
a+6×-4=4
a-24=4
a= 24+4=28

Answer 2

Given,
Common differences = - 4
a7th = 4
=> a + 6d =4
=> a+ 6× - 4 =4
=> a - 24 = 4
=> a = 28 //Ans