Math, asked by Ajaycr71, 1 year ago

solve this answer fast please

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Answered by santhosh2002

0

a+3d=0
a=-3d

a+24d=-3d+24d=21d------------2
3times 11 term
3(a+10d)
3(-3d+10d)
3*7d
21d------. 1

1and2hence. proved

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