Math, asked by amitcool1868, 1 year ago

a=minus 14 , d=4, sn = 0 , find n

Answers

Answered by sahaneashwini28

0

Answer:

n=16 or n=0

Step-by-step explanation:

Sn=n/2[2a+[n-1]d]

0=n/2[-28+[n-1]4]

0=n/2[-28+4n-4]

0=n/2[-32+4n]

0=n[-16+2n]

0=-16n+2n2

2n2-16n=0

after solving this quadratic equation we get

n=0 or n=16

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