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CBSE Class 10 Answered

how to solve these questions?
Asked by tuhina sanwal | 12 Mar, 2011, 11:57: PM
answered-by-expert Expert Answer
dear student,
to find any term of the AP. we need the first term a and the common difference d.
let a and d be the first term and common diff of the A.P.
so,
ATQ,
a+(p-1)d=
a+(q-1)d=
solving we get,
so using the formula for sum of n terms and putting n=pq we get the sum of pq terms
required sum
=
=
pl send rem qns in seperate mails. one qn in one mail.
Answered by | 12 Mar, 2011, 07:50: PM

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