1.

if the sum of the first 14 terms of an AP is 1050 and first term is 10 then find the 20th term

Answer» s14=14/2(2a+13d)1050=7(20+13d)1050=140+91d910 = 91dd=10a=10 (given)a20=a+(19d) = 10+190 = 20020th term = 200
ATQ...... 20TH TERM=200A=10D10


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