first term of an AP is 4and the common difference is 3. Its 12th term is same as the 8th term of another AP having first term -5.find the common difference of the second AP
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HINT....The nth term of an arithmetic sequence is an=a+(n−1)d Therefore you have ... Lagi
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T7−T1T11−T7=64 Substituting values of T7,T11 and solving gives T1=b−c directly. Lagi
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You know that a7=7b+5c=a+7d and a11=11b+9c=a+11d. S
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