Question

kth term of on AP 1, 5, 9, 13 is 45 then find the value of k.​

Answer 1

Answer:

k= 12

Step-by-step explanation:

a = 1

d = 4

45 = a + (n − 1)d

45=1+(k − 1)4

(k-1)4 = 44

k − 1 = 11

k = 12

Answer 2

Answer:

Therefore the 12th term of the AP is 45

Step-by-step explanation:

a1=1

a2=5

a3=9

d=a2-a1=5-1

=4

We know tht kth term is 45

An = a +(n-1)d

in place if n replacing k

Ak= a+(k-1)d

45=1+(k-1)4

45=1+4k-4

45=-3+4k

45+3=4k

48=4k

k=48/4

k=12

Hope it Helps u...