Complete the following activity to find ...

Complete the following activity to find the sum of all natural numbers between 1 and81 divisible by 8.
The number between 1 and 81 divisible by 8 are 8,16,24,… , 80.
Here, `a= t_(1) = 8, d= 8, t_(n) = 80, n = ? , S_(n) = ?`
`t_(n) square ` ...(Formula)
` :. 80 = 8 + square ` ....(Substituting the values )
`:. 80 = square `
`:. n = 10`
Now, we find `S_(10)`.
`S_(n ) = ( n )/(2) square ` ...(Formula )
`:. S_(10) = (10)/(2) xx square ` ....(Substituting the values )
`:. S_(10) = square `

Similar Questions

Explore conceptually related problems

Find the sum of all natural numbers below 500 which are divisible by 8.

Complete the following activity to find the natural numbers between 1 and171 which are divisibleby 5. The natural numbers between 1 and171 divisible by 5 are 5,10,15, …,170. Here, a = square, d = square, t_(n) = 170 t_(n) = a + ( n -1) d :. 170 = 5 + ( n -1) xx 5 :. 170 = square n = square

Find the least number that is divisible by all the numbers between 1 and 8.

n^2 -1 is divisible by 8, if n is

Complete the following activity , to find the two-digit numbers which are divisible by 4. The two -digit numbers divisible by 4 are 12,16,20,…, 96. Here, a = 12, d= 4, t_(n)= 96 . t_(n) = a+ ( n -1)d …( Formula) :. square = 12 + ( n -1) xx square :. square = 12+ 4n -4 :. 4n = square :. n = 22

n^(2)-1 is divisible by 8 , if n is

For every natural number n, 3 ^(2n+2)-8n -9 is divisible by 8

n^2-1 is divisible by 8, if n is

Similar Questions

Recommended Questions