1 + a+ a square + a cube upto a to the power n equal to 1 + a into 1 + a square into 1 + a to the power 4
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aplly gp
a(1-a^n)/1-a=1+a
a(1-a^n)/1-a=1+a
amarnathray08pal5ux:
not satisfied please do again
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