the statement is: Is r^5 s^r

Question

the statement is: Is r^5 > s^r

Fig · Answer

(C) for me also

From (1) o If r=s=1, then r^5 = s^r = 1 o If r=1 s=-1, then r^5=1 > (-1)^1 = -1 INSUFF. From (2) No information about r. INSUFF. (1) combined with (2) r = s^4 = 16 We know r and s, so we can conlude. SUFF.

trivikram · Answer

Taking logs on both sides

we need to find 

5*logr > r*logs

logr/logs > r/5-----------(a)

but from (1) we have r = s^4

so substitute in (a)

4 > s^4/5

so 4> 16/5 (we know s=-2 from II)

so C

jainan24 · Answer

You all got C, I had gotten C too, but the OA and OE is something else

Fig · Answer

And what about this case : If s=-1, then r=1 and r^5=1 > (-1)^1 = -1 ?

From what I read, it is explained that (-1)^((-1)^4) = 1.... that's not true

..... a^1 = a not |a|. What is the source of this surprising question?

Fig · Answer

Thanks. I have never heard about it before

.... The OA & OE are wrong

Andr359 · Answer

You guys are right. ItÂ´s C.

the statement is: Is r^5 > s^r

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