The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

June 2009 C1

Hai

Question 2) Given that 32 square root of 2= 2^a, find the value of a

I get the answer a = 11, but the mark scheme says 11/2, why would you divide it by 2? P:

- Thanks
Original post by Sadbunny11
Hai

Question 2) Given that 32 square root of 2= 2^a, find the value of a

I get the answer a = 11, but the mark scheme says 11/2, why would you divide it by 2? P:

- Thanks

You need to post your working for us to point out where you went wrong.
Is the question to solve for a:
322=2a32\sqrt 2 = 2^a?
Reply 2
Avatar for ttoby
ttoby
15
322=25212=25+12=211232\sqrt{2}=2^52^\frac{1}{2}=2^{5+\frac{1}{2}}=2^\frac{11}{2}
Reply 3
Avatar for Khodu
Khodu
19
Lun it?

aww C1.
Reply 4
Avatar for Sadbunny11
Sadbunny11
OP
Oh...

What i did was go 32x32 (to find the square root) which was 1024 x 2 (since 2 was in square root to get 2048) then i just wrote

2 x 2 x 2 .... etc. and until i got 2048 which was 11 times. but i get ya way

Thankyou!
wont the 2 become 4
cause it multipling 2 and 2

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you