The 6th term of an A.P is -10 and it's 10th term is -26. Determine the 15th term of an A.P
Answers
Answered by
15
Step-by-step explanation:
A(6) = -10
a + 5d = -10 -------(1)
A(10) = -26
a + 9d = -26 -------(2)
equation (2) - (1) से
4d = -16
d = -4
equation (1) से
a + 5(-4) = -10
a = -10+20
a = 10
A(15) = a + 14d
= 10 + 14(-4)
= 10 - 56 = -46
Similar questions