OR
The 9th term of the A.P. - 15,- 11, -7, ..., 49 is
(A) 32
(B) 0
(C) 17
(D 13
Answers
Answer:
a=-15
d=-11+15=4
n=9
an=a+(n-1)d
an=-15+(9-1)4
an=-15+(8)4
an=-15+32
an=17 Answer
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The 9th term of the A.P. - 15,- 11, -7, ..., 49 is 17
Step-by-step explanation:
AP is
-15 , -11 , - 7 , .................................49
First term = a = - 15
Common difference d
d = -11 - (-15) = 4
d = 4
nth term of an AP is a + (n - 1)d
= -15 + (n - 1) 4
= -15 + 4n - 4
= 4n - 19
Hence nth term of AP
= 4n - 19
9 term => n = 9
= 4(9) - 19
= 36 - 19
= 17
option C is correct
The 9th term of the A.P. - 15,- 11, -7, ..., 49 is 17
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