Question

(vi) a= 8, a = 62 और S, = 210 दिया है। n और d ज्ञात कीजिए।​

Answer 1

Answer:

a=8,a

n

=62,s

n

=210

a

n

=a+(n−1)d

62=8+(n−1)d

54=(n−1)d

s

n

=

2

n

[2a+(n−1)d]

210=

2

n

[16+(n−1)d]

420=n[16+54]

420=70n

n=6

54=(6−1)d

d=

5

54