A) \[r+s\]
B) \[\frac{r-s}{r+s}\]
C) \[\frac{r+s}{r-s}\]
D) \[r+s+1\]
Correct Answer: A
Solution :
\[\frac{{{t}_{P}}+{{t}_{q}}}{2}=\frac{{{t}_{r}}+{{t}_{s}}}{2}=a+(p-1)\,d+a+(q-1)\,d=\]\[a+(r-1)\,d+a+(s-1)\,d\] |
\[\therefore \] \[p+q=r+s.\] |
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