Question

Find the number of terms in the A.P. : 18, 15, 13, ..., - 47.


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Answer 1

Answer:

The question is wrong

Step-by-step explanation:

Find the number of terms in the A.P. : 18, 15, 13, ..., - 47.

For an AP to be true = 2nd term - 1st term = 3rd term - 2nd term

                                     15 - 18 = 13 - 15

                                     - 3 = - 2

This is not equal. Hence the question is wrong.

#BAL

#answerwithquality

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Answer 2

a=18

d=15-18

=-3

an=-47

an=a+(n-1)d

-47 =18+(n-1)(-3)

-47-18=(n-1)(-3)

-65/-3=n-1

65/3+1=n

65+3/3=n

68/3=n

n=22.66....

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