the second, thirty first and last term is 21÷4,1÷2,6÷2. find the first term and number of term
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The answer is
1/2-21/4=-19/4
D=(-19/4)
a=21/4-(-19/4)
a=21/4+19/4
a=40/4
a=10
1/2-21/4=-19/4
D=(-19/4)
a=21/4-(-19/4)
a=21/4+19/4
a=40/4
a=10
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