the sum of 4th and 20th term of A.P. is equal to the sum of 8th , 15th and 12 th term . find the term which is 0 Select.
A) 10 B) 7 C) 11 D) 5 E) 3
t4 + t20 = t8 + t15 + t12   =&gt; a+3d + a+19d = a+7d + a+14d + a+11d   =&gt; a + 10d = 0   =&gt; t11 = 0 i.e. 11th term is zero.   ANSWER: 11
<result>C</result>
the sum of 4th and 20th term of A.P. is equal to the sum of 8th , 15th and 12 th term . find the term which is 0