Math, asked by sinanfidha121mon, 3 months ago

Sum of 15th and 16th terms of an arithmetic sequence is 200.
a) What is the sum of 1st and 30th terms? lado
b) Find the sum of first 30 terms 200
If its 10th term is 78.1
c) Find 21st term?
d) Find the common difference?
e) Write it's algebraic form.
sum

Answers

Answered by 111KING111
0

Answer:

t(n) = a + (n - 1 ) d \\ s(n) =  \frac{n}{2} \times 2a  + (n - 1)d

Step-by-step explanation:

try to solve using these answer will be given tomorrow

Answered by afdwl
1

Answer:

Step-by-step explanation:

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