Question

How many integers are there between 25 and 129 which are divisible by 7

Answer 1

hi...

A.P. - 28, 35 , ..........., 126

we have

▪a = 28
▪l = 126
▪d = 7

to find
▪n

$a(n) = a +(n - 1)d$

$126 = 28 + (n - 1)7$

$126 - 28 = (n - 1)7$

$98 = (n - 1)7$

$n - 1 = \frac{98}{7}$

$n - 1 = 14$

$n = 14 + 1$

$n = 15$

$\huge{ \bold{thank \: u}}$

Answer 2

Answer:

Step-by-step explanation:

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