Question

in an AP, if the common diffrence (d)- -4, and the seventh term (a,) is 4, then find the first term.​

Answer 1

Answer:

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Answer 2

Answer

a = 28

Given

Common difference of AP = -4

7th term of AP. = 4

Solution.

We know that

7th term of AP = a + 6d = 4

a + 6d = 4

a + 6(-4) = 4

a - 24. = 4

a. = 4 + 24

a. = 28

So 1st term of AP is 28

Verification

7th term of AP =>

a + 6d. = 28 + 6(-4)

4. = 28 - 24

4. = 4

hence verified