which term of A.P. 21, 18 ,15....is -81 ?
Answers
Answered by
10
The term of AP which is - 81 is :- 35th term
an = a + (n-1) d
-81 = 21 + - 3n + 3
-3n = - 81 - 24
-3n = - 105
n = - 105/-3
n = 35th term of the AP.
an = a + (n-1) d
-81 = 21 + - 3n + 3
-3n = - 81 - 24
-3n = - 105
n = - 105/-3
n = 35th term of the AP.
bathulaakshitha7:
plz show me process dear..
Answered by
3
an=a+(n-1)d
-81=21+(n-1)-3
-78=21+(n-1)d
-99=n-1
n=-98
(a=21,d=-3)
hope it's help's you dear..
-81=21+(n-1)-3
-78=21+(n-1)d
-99=n-1
n=-98
(a=21,d=-3)
hope it's help's you dear..
Similar questions