Question

The 6th term of Arithmetic sequence is 10.What is the sum of 11 terms of am arithmetic sequence ?

Answer 1

Answer

S11 terms = 110

Solution

6th terms of Ap =

T6 = a + 5d = 10 ........ (1)

sum of 11 terms

FORMULA OF SN TERMS

Sn = n / 2 ( 2a + ( n - 1 ) d

=> S11 = 11 / 2 ( 2a + 10d )

=> 11 / 2 X 2 ( a + 5d)

=> 11 ( a + 5d ) .... put equation (1)

=> 11 (10 )

=> 110 = ANSWER