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Let a1,a2,a3,...,an be in A.P. If a3+a7+a11+a15=72, then the sum of its first 17 terms is equal to: |
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Answer» Let a1,a2,a3,...,an be in A.P. If a3+a7+a11+a15=72, then the sum of its first 17 terms is equal to: |
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