5th term of an arithmetic sequence is 10 and 20 th term is 50 find the sum of 10th term and 15 th term
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Answered by
2
Answer:
Step-by-step explanation:
13. Factorise each of the following:
2V2r? + 27 + 18x² + 27 2x
(1)
Answered by
2
Answer:
92/3
Step-by-step explanation:
according to question
a+4d=10
a+19d=20
now on simultaneously solving both the equations we get
d=2/3
a=22/3
therefore using the values of a and d we get 10th and 15th term as 14 and 50/3 respectively
which leads to the sum of 92/3.
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