Question

Find the sum:
1. 2 + 7 + 12 + 17 +
to 19 terms​

Answer 1

Answer:

The sum of the given ap is 893

Step-by-step explanation:

Here...a=2 and d=5

L=2+(19-1)5

=2+18×5

=92

Sum=n/2(a+1)

=9/2(2+92)

=19×94/2

=893

Answer 2

If 2+7 =9
And 12+17=29
Then 22+27=49
And so on do this 9 times we will have
9+29+49+69+89+109+129+149+169=801
Then add only 92 you will have 893 the answer