39wats the problem dude?
write the equatins for the given sums and get a and d of the AP. then susbt for p terms, u will get it.
tell if u still not getting
if in a AP
suthe sum of m terms is equal to sum of next n terms is equal to sum of next p terms...
then prove that
m+n *( 1 / m - 1 / p)
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3 Answers
39
1did u get these:
S1 = m/2 [2a + (m-1)d] --------------- #1
S2 = n/2 [2(a+md) + (n-1)d] ---------------#2
S3 = p/2 [2{a+(m+n)d} + (p-1)d] ---------------#3
if u have got these,,,
equate 1 and 2, then 1and 3 or anything ..
u get two eqns... relating the two unknowns a and d.
solve for them.
then put the valued in one of the eqns ..
u will get ans...