Question

find the sum of 4,7,10,13,.......upto 25
terms
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Answer 1

Answer:

Correct answer is 1702

Step-by-step explanation:

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Answer 2

Here,

a = 4

d = 3

n = 25

Sum of n number of terms is 25.

Now by applying the formula,

Sn = n/2 × (2×a + (n-1) × d)

S25 = 25/2 × (2×4 + (25-1) × 3)

S25 = 12.5 × (8 + (24) × 3)

S25 = 12.5 × (8 + 72)

S25 = 12.5 × 80

S25 = 1000

Hence, the sum of 4, 7, 10, 13, .... upto 25 terms is 1000