Question

In an ap the sum of first n terms is 5n2 +3n/2. Find 20 th term

Answer 1

Answer:

Step-by-step explanation:

Put value of n=1

We get=8/2=4

N=2

26/2=13

So,4,13....

a=4

d=9

To find 20 term

a+19d

4+19*9

4+171

175 is the answer

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Answer 2

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