Question

a+(a+d) +(a+2d)+....upto n terms =n/2(2a+(n-1) d) ​

Answer 1

Answer:

This can be proved by the principle of finite mathematical induction

For proof u can refer the attachment

STEP BY STEP Explanation:

>>Assume that the given statement is some p(n)

>>Take n=1 and check whether it satisfies it satisfies p(n) is true for all n belongs to natural numbers

>>Now we assume that is true for n=k

>>add (k+1)th term then after solving ,it can be proved .

Answer 2

Answer:

and send photos of the solution