Question

If the sum of the first 14 terms of an A.P. is 1050 and its first term is 10, then find the 21st

term of the A.P.​

Answer 1

Answer:

S14=1050 a=10 a21=?

Step-by-step explanation:

S14=14/2(2×10+13d)

1050=7(20+13d)

1050/7=20+13d

150-20=13d

d=130/13

d=10

a21=a+20d

a21=10+20×10

a21=10+200

a21=210.