Question

in an AP if a=9.2 d=4.6 an=9.2 then find the value of n​

Answer 1

Step-by-step explanation:

The arithmetic mean is

The formula for the arithmetic mean between two terms, and is given by,

Substitute the value of arithmetic mean as in the above expression.

Further simplify the above expression.

Further simplify the above expression.

Compare the powers of corresponding terms on both sides in the above expression.

Thus, the value of is .

Answer 2

Answer:

n=1

Step-by-step explanation:

an= a+(n-1)d

9.2 =9.2+(n-1)4.6

9.2 =9.2+4.6n-4.6

9.2 =4.6+4.6n

9.2-4.6=4.6n

4.6 =4.6n

n = 4.6/4.6

n=1

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