## anonymous 5 years ago f(x)= 7^x logbase3 (x) I need to find the derivative .... but I can only enter the answer using change of base - can anyone provide direction? Thanks

1. anonymous

Is it correct

2. anonymous

$7^x \log_3(x)$

3. anonymous

$d/dx \log(x)=1/xln(b)$

4. anonymous

scratch that

5. anonymous

$d/dx \log_b(x)=1/xln(b)$

6. anonymous

So you will use product rule

7. anonymous

any question?

8. anonymous

ok I see that and I am kinda clear - in that eq. where is the 7^x ah..1/7ln3

9. anonymous

3ln(x)=1/7ln3

10. anonymous

How is going so far?

11. anonymous

is it...? [(1\7ln 3(x)) -(3\ln (x))]

12. anonymous

$d/dx (7^x)=\ln (7)*7^x$

13. anonymous

product rule is u*v'+v*u'

14. anonymous

my computer died. I am back and will try again. Thank you now I'm guest.... this is 1477

15. anonymous

haven't quite got there but I have to go now. thank you so much for your help!!!