Question

find t11 of the A.p. 4,9,14,...

Answer 1

a=4,n=11,d=5
t11=4+(11-1)5
t11=4+(10)5
t11=4+50=54

Answer 2

In this A.P ;
a = 4
d = 9-4 = 5
Tn = a +(n-1)d
n = ?

T11 = 4+(11-1)5
= 4 + (10×5)
= 4 + 50
= 54
.
the 11th term of given A.P is 54.


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