Question

in an ap if SN is equal to 4n-n square then d​

Answer 1

the value of d is -1

Answer 2

The value of d is 4

Step-by-step explanation:

We are given that in AP :

$S_n=4n-n^2$

Substitute n = 1

$S_1=a_1=4(1)-1^2=3$

Substitute n = 2

$S_2=4(2)-2^2=4\\S_2=a_2-a_1\\4=a_2-3\\7=a_2\\d=a_2-a_1=7-3=4$

Hence the value of d is 4

#Learn more:

If Sn is the sum of furst n terms of an AP is given by Sn=3n2-4n ,find the nth term. ​

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