Q15. Which of the following statement is true? < I. p + q = p + q when p≥ 0 and q ≥ 0< II. |pq|lp|lq| when p ≤ 0,q ≤ 0 and [p] ≥ |q|< = III. |pq|≤||pl|al| (a) I and II are correct (b) II and III are correct (c) I and III are correct

Advanced Engineering Mathematics
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ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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Q15. Which of the following statement is true? <
I. lpl + lq lp + q| when p≥ 0 and q ≥ 0<
=
II. |pq|p|lq| when p ≤ 0, q ≤ 0 and p| ≥ |q|
=
III. |p± q|≤|lp|-|al|
(a) I and II are correct
(b) II and III are correct
(c) I and III are correct
(d) all are correct
Transcribed Image Text:Q15. Which of the following statement is true? < I. lpl + lq lp + q| when p≥ 0 and q ≥ 0< = II. |pq|p|lq| when p ≤ 0, q ≤ 0 and p| ≥ |q| = III. |p± q|≤|lp|-|al| (a) I and II are correct (b) II and III are correct (c) I and III are correct (d) all are correct
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