Question

Without calculating evaluate 7 + 9 + 11 + 13 + 15 + 17

Answer 1

Answer:

Without calculating evaluate 7 + 9 + 11 + 13 + 15 + 17

7 + 9 + 11 + 13 + 15 + 17

answer 72

Answer 2

Answer:

The correct answer is 72.

Step-by-step explanation:

a = 7

d = 9 - 7 = 2

n = 6

Sum of n terms in AP = n/2[2a + (n – 1)d]

So , 6/2 [ 2×7 + ( 6-1) 2 ]

= 3 [ 14 + 10 ]

= 3 × 24

= 72