Find the sum of 25 terms of an ap 2,10,18,26​

Explanation:

1st term a= 10 , common diff b= 16–10=6 , now 25 th. Term T25 = a+(n-1)*b = 10+24*6=154

S = n/2(a+l) = 25/2(10+154) = 25*82 =2050

what are the choices?

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.