Question

in an ap, in the comman difference(d) = -4, andthe seventh term (a⁷) is 4 thenfind the first term​

Answer 1

Answer:

here the common difference d=-4

let the 1st term is a

so the 7th term is a+(7-1)(-4)=4

                            => a+6*(-4)=4

                          => a-24=4

                        => a=4+24=28

so the 1st term is 28

Step-by-step explanation:

Answer 2

Answer:

d = -4

a7 = 4

a = ?

Solution :-- a7 = a + 6d

= 4 = a + 6 × ( - 4 )

= 4 = a - 24

= a = 24 + 4

= a = 28 Answer