11th Maths Chapter 10 Intro + Example 2,3,4,5

The 26th, 11th and the last terms of an AP are, 0, 3 and -(1)/(5) , respectively. Find the common difference and the number of terms.

Class 12 ncert maths solution chapter vector algebra exercise 10.2 Qno.4,5

The ratio of the 11th term to the 18th term of an AP is 2 : 3 . Find the ratio of the 5th term to the 21st term and also the ratio of the sum of the first five terms to the sum of the first 21 terms.

Class 12 maths ncert solution chapter vector algebra Ex-10.2 Qno.1

The 5th, 8th and 11th terms of a G.P. are p, q and s, respectively. Show that q^(2)=ps.

The 5th, 8th and 11th terms of a G.P. are P, Q and S respectively. Show that Q^(2)='PS .

Refer to Example 5, Section 14.4, Chapter 14. Find the probability that a student of the class was born in August.

If the 4^(th),7^(th) and 10^(th) terms of a G.P. are a, b and c respectively, prove that : b^(2)=ac

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