11. In an AP, if the common difference (d) -4and the seventh term a is – InterviewSolution

1.

11. In an AP, if the common difference (d) -4and the seventh term a is 4, then find theCBSE 201811first term.

Answer»

If d= -4and 7 th term = a+6d= 4as Tn= a+(n-1)dso a+6(-4)= 4a= 4+24= 28First term will be 28

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