Question

If common difference d is -4 and seventh term of an


a.p is 4 find its first term?

Answer 1

Heya User ✌

Here's your answer friend,

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✔ GIVEN COMMON DIFFERENCE (d) = (-4)

and,

✔ 7th term of an ARITHMETIC PROGRESSION (a7) = 4

➡ FIRST TERM (a) = ?

==>
$since$
==> a7 = a + 6d = 4

Now,

by substituting the value of d in above equation we have,

==> a7 = a + 6d = 4

==> a + 6d = 4

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

==> a - 24 = 4

==> a = 4 + 24

==> a = 28

HENCE, THE FIRST TERM OF ARITHMETIC PROGRESSION IS 28.

HOPE IT HELPS YOU :)

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