Question

In an AP the 7th term is 4 and the common difference is -4, what is its First term?
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Answer 1

Answer:

Step-by-step explanation:

a7 = 4

a7 = a + 6d

d = -4

4 = a + 6 (-4)

4 = a - 24

a = 28

Answer 2

Answer:

a=28

Step-by-step explanation:

given:- a7 = 4

common difference = -4

solution:-

using formula;

an= a+(n-1)d

a7 = a+(7-1)(-4)

d = a+6(-4)

4 = a-24

a= 24+4

a= 28. (ans)