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If the ratio of the sum of first n terms of two APs is (7n + 1) : (4n + 27), then find the ratio of their 9th terms.

By Faith

If the ratio of the sum of first n terms of two APs is (7n + 1) : (4n + 27), then find the ratio of their 9th terms.

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Faith

11
A circular cone is cut by a plane parallel to the base and the conical portion is removed
15
in the curved surfa

Fig. 6.15
In Fig. 6.16, if x+y=w+z, then prove that AOB
is a line.
B
r.r. I
Fig. 6.16​

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