Question

Find the sum sum of ap 2 7 12 upto 12 terms ​

Answer 1

Answer:

the answer to this can be obtained by using the AP sum formula n/2 (2a + (n-1)d)

where n is number of terms a is first term and d us common difference

from given numbers a=2

d = difference in two consecutive terms (7-2) = 5

and n = 12 (given)

Substituting in the formula

12/2 (2*2 + (12-1)*5))

= 6(4 + 55)

= 6*59 = 354

Hope it helps