Question

Find the sum of integers between 10 and 70

Answer 1

This is the solution .

Answer is 2430

Answer 2

Answer:

Mark as Brainliest pls

Sum=2360

Step-by-step explanation:

treat this like an arithmetic progression

the first term, a = 11

the last term, l = 69

the difference = 1

we have to find the number of terms

$U_{n}=a+(n-1)d$

69 = 11 + (n-1)1

69-11=n-1

58 = n-1

n = 58 + 1

n = 59

now find sum of A.P.

S=n/2 (a +l )

S = 59/2 (11+69)

S=59/2 x 80

S=59 x 40

S=2360

or you could just add all the integers one by one