Question

find the sum of first 30 positive integers divisible by 4​

Answer 1

Step-by-step explanation:

step 1:

Address the formula, input parameters & values.

Input parameters & values:

The number series 4, 8, 12, 16, 20, 24, 28, 32, . . . . , 120.

The first term a = 4

The common difference d = 4

Total number of terms n = 30

step 2:

apply the input parameter values in the AP formula

Sum = n/2 x (a + Tn)

= 30/2 x (4 + 120)

= (30 x 124)/ 2

= 3720/2

4 + 8 + 12 + 16 + 20 + 24 + 28 + 32 + . . . . + 120 = 1860

Therefore, 1860 is the sum of first 30 positive integers which are divisible by 4.

Answer 2

These are the multiples of 4 under 30 :-

4 + 8 + 12 + 16 + 20 + 24 + 28

= 112 Ans

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