Question

Write
the
Sum
of nth term of an AP if first term a and last term a.n is given​

Answer 1

Answer:

GENERAL FORM OF A.P

a,a+d,a+2d,a+3d,....

THE nth TERM OF A.P

an=a+(n-1) × d

SUM OF nth TERMS IN AP

S=n/2[2a+(n-1) ×d]

SUM OF ALL nth TERM IN A FINITE A.P WITH THE LAST TERM AS "I"

n/2(a+1)

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