Question

The first term of an arithmetic progression is unity and the common difference is 4. Which will be 9 th term of this AP ?
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Answer 1

Answer:

Given, a = 1, d = 4.

Option 1: T = 4551 a + (n-1)d = 4551

1 + (n-1)4 = 4551

n-1=4550/4 = not divisible by 4

Option 2: T = 10091

n-1 = 10090/4 = not divisible by 4

Option 3: T=7881

n-1 = 7880/4 = 1970

n = 1971 which is an integer. Therefore Option 3 is correct.

Answer 2

Answer:

Hello.

Step-by-step explanation:

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