The sum of 5th and 9th terms of an ap is 30 if its 25th term is three times its 8th term find the AP.
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Answer:
If two powers have the same base then we can multiply the powers. When we multiply two powers we add their exponents.
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Question:-
The sum of 5th and 9th terms of an ap is 30 if its 25th term is three times its 8th term find the AP.
Given:-
The sum of 5th and 9th terms of an AP is 30.
25th term is three times its 8th term.
To Find:-
The AP
Solution:-
Adding (i) and (ii):-
Substitute d = 2 in equation (i)
- The first term = a = 3
- The second term = a + d = 3 + 2 = 5
- The third term = a + 2d = 3 + 4 = 7
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