3+6+9+.......................+96
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3+6+9+12+15+18+21+24+27+30+33+36+39+42+45+48+51+54+57+60+63+66+69+72+75+78+81+84+87+90+93+96.
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Step-by-step explanation:
a=2 B= 6 D= 4
an=a+(n-1) d
96=2+(n-1)4
96-2=4n-4
94+4=4n
98/4=n
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