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2 years ago

The 2th term of The A.P is 7 and 9th term is 28, Find The comon difference and The first term.

Mathematics

1 answer:

Radda [10]2 years ago

8 0

Answer:

difference = 3, first term = 4

Step-by-step explanation:

given, a2 = 7

a9 = 28

wkt, a2 = a + d = 7

a9 = a + 8d = 28

- 7d = - 21

therefore d = 3

and wkt, d = a2 - a

a = 7 - 3 = 4

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