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a+(n-1)d=nth term
so a =4 d=-1-4=-5
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Hi !
First term = a = 4
Common difference = d = -5
Last term = l = -106
No: of terms = n = ?
We know that,
l = a + (n- 1)d
-106 = 4 + ( n - 1)-5
-110 = ( n - 1) - 5
22 = n - 1
n = 23
There are 23 terms in the A.P..
First term = a = 4
Common difference = d = -5
Last term = l = -106
No: of terms = n = ?
We know that,
l = a + (n- 1)d
-106 = 4 + ( n - 1)-5
-110 = ( n - 1) - 5
22 = n - 1
n = 23
There are 23 terms in the A.P..
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