Question

a , b, c ,d, e, f are in A.P then find the value of a²-b²+c²-d²+e²-f² having common difference D=-1

I will mark you brainlist for the correct answer
​explanation needed

Answer 1

Answer:

a , b, c ,d, e, f are in A.P then find the value of a²-b²+c²-d²+e²-f² having common difference D=-1

I will mark you brainlist for the correct answer

explanation needed