Question

Find the sum of the following APs: (i) 2, 7, 12,…… to 10 terms.​

Answer 1

Answer:

245..is the answer.

Step-by-step explanation:

AP : 2, 7, 12,....10 terms.

a : 2

d : 7-2 = 5

n= 10

sum of AP : n/2{2a + (n-1)d}

= 10/2{2×2 + (10-1)5}

= 5(4+9×5)

= 5(4+45)

= 5×49

= 245.

Answer 2

Find the sum of the following APs: (i) 2, 7, 12,…… to 10 terms.