Question

In an AP if the common difference is -4, and the seventh term is 4, then find the 1st term

Answer 1

T7 = a + 6d

4 = a + 6 * -4

4 = a - 24

28 = a

28 Answer.

Answer 2

Hi ☺ !!

Solution :




Common difference ( d ) = -4.


Also,


seventh term ( T7) = 4


a + 6d = 4


a + 6 × -4 = 4

a - 24 = 4


a = 4 + 24

a = 28.


Hence,

First term of the given AP ( a ) = 28.


☺ Hope it will help you ☺


By SaniyaAnwar

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