Asked by oshinowo ayodeji Samuel
The 5th and 10th terms of A. P are - 12 and 27 respectively. Find the A. P and its 15th term. (B) The first three terms of an A. P are x and the 10th term.
Answers
Answered by
Reiny
Using the basic definitions:
a + 4d = -12
a + 9d = 27
subtract them
5d = 39
d = 39/5 or 7.8
sub back in ....
a+4(7.8) = -12
a = -43.2
sequence is:
-43.2 , -35.4, -27.6, -19.8, -12, ...
term15 = a + 14 d
= .....
B) The first three terms of an A. P are x and the 10th term.
That statement makes no sense to me.
a + 4d = -12
a + 9d = 27
subtract them
5d = 39
d = 39/5 or 7.8
sub back in ....
a+4(7.8) = -12
a = -43.2
sequence is:
-43.2 , -35.4, -27.6, -19.8, -12, ...
term15 = a + 14 d
= .....
B) The first three terms of an A. P are x and the 10th term.
That statement makes no sense to me.
Answered by
Oladotun
This is absolutely correct, like really correct 💟💘💝💝
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