Question

find the number of terms in the sequence 7,13,19.........151

Answer 1

Tn=a+(n-1)d
151 =7+n-1×6
151-7=n-1×6
144=n-1×6
144/6=n-1
24=n-1
25=n

Answer 2

Hey there ,

An = 151
a = 7
d = 6

an = a + (n-1)d
151 = 7 + (n-1)6
144 = 6n - 6
150 = 6n
n = 25

So, total numbers in the sequence is 25

Here , An = Last Number
a = first Number
d = common difference

Thanks!