Question

AP=-1,4,9,14.....119
in which 119 comes
N=?​

Answer 1

Answer:

n=25

Step-by-step explanation:

d=5,a=-1,an=119

an=a+(n-1)d

119=-1+(n-1)5

120=5n-5

125/5=n

n=25

Answer 2

Answer:

Given:Ap= -1,4,9,14....119

To Find: n of 119

Solution:

An= A + (N-1)D

A=-1. D=5

An= -1 +( N-1)5

119+1=(N-1) 5

120/5 = N-1

24= N-1

N=24+1

N=25

Therefore 119 is 25 th of the given AP

Hope it helps!!

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