26. If p, q, r and s are proportional then the mean pro-
portion between p2 + y2 and q2 + 52 is
(a) prlas
(b) pq+rs
(c) plq + s/r
(d) p/q2 + r2/52
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Answer:
The correct answer is (b) pq+rs
Hope this helps you...
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