Four terms are in A.P. if the sum of two extreme terms is 8
& and the product of mean terms 15. Two tèrms will be:
"(a)3,7 (6)3,9 (c) 1,4 (d) 2,4
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Given :-
Four terms are in A.P
Sum of extreme is 8 and product of
mean is 15.
To find :-
The two terms.
Solution:-
Let the four terms in AP be a + 2d , a + d , a - d , a - 2d.
A/Q.
→
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Now,
→
→
→
→
→
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Hence,
The terms is A.P will be :-
a + d = 4 + 1 = 5
a - d = 4 - 1 = 3
a + 2d = 4 + 2 × 1 = 4 + 2 = 6
a - 2d = 4 - 2 × 1 = 4 - 2 = 2
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